* Another fix for exim workaround (#637)
* Fix unencrypted passwords processing in the controller
* Fix setting path for lua (#652)
* Fix usage of rdns reply structure (#654)
* Use file lock in logger to avoid deadlocks
* Add `application/octet-stream` mime type for `pdf` extension (by @moisseev)
* Implement new automata to skip empty lines for dkim signing (#651)
* Fix parsing of missing classes
* Clarify some rspamc arguments (by @fatalbanana)
* Correct suppress spelling

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Slightly reduce weights of rules with high FP rate
* Add workround for rspamd-1.3
* Fix possible FP in TRACKER_ID rule
* Simplify MISSING_MIMEOLE rule
* Add workaround for gmime CTE stupidity
* Fix mime headers processing
* Fix false positive URL detections in text parts
* Fix Exim shutdown patch
* Enable workaround for exim mailbox format
* Backport shingles static test
* Fix levenshtein distance calculations
* Fix max_train setup in ANN module
* Fix redis structure by adding {NULL, NULL} member
* Fix build with unmodified LibreSSL opensslv.h
* Repair optional dependencies
* Really skip filters in case of pre-result set
* Restore the intended pre-filters behaviour
* Fix ipv6 mask application

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix parsing of URLs in texts
* Fix creating of URLs from LUA
* Fix some more URL detector issues
* Fix unit tests
* Fix JIT compilation for PCRE2 expressions
* Fix JIT usage for PCRE2
* Fix UTF8 mode in PCRE2
* Add workaround for pre-historic compilers (#605)
* Fix and rescore R_PARTS_DIFFER logic
* Properly set lua paths for tests
* Fix SA rawbody processing - exclude top part
* Store text parts content with newlines stripped
* Properly support SA body regexps
* Fix body rules in SA plugin
* Fix setting of score for parts differ
* More fixes to parts distance calculations
    - Use hashed words instead of full words for speed
    - Improve levenstein distance calculations and penalise replaces
    - Always return number from 0 to 1
    - Use g_malloc instead of alloca
* Fix percents output in R_PARTS_DIFFER
* Plug memory leak in dkim module
* Plug minor memory leak in regexps creation

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Plug an important memory leak in headers getting code
* Remove some bad domains from whitelists

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Implement new multipattern matcher that uses hyperscan if possible
* Use mutlipattern for lua_trie code
* Add utility methods for multipattern
* Use multipattern in url matcher
* Add escape functions for hyperscan
* Allow to optimize lua -> C transition by flattening table args
* Optimize hot paths in SA plugin
* Optimize rspamd_re_cache_type_from_string
* Allow empty tries
* Fix extraction of URLs from Subject
* Allow to have different flags for different patterns in multipattern
* Add common directory for hyperscan cache to config
* Implement caching for hyperscan multipattern
* Attach domain part to `R_SUSPICIOUS_URL` (by @moisseev)
* Allow multipattern scans to be nested for the case of hyperscan
* Simplify SURBL redirector search code and avoid ac_trie
* Add two way substring search algorithm
* Avoid acism usage to find gtube pattern
* Fix processing of empty headers
* Allow to disable pthread mutexes on broken platforms
* Make web interface not send password in query strings (#585) by @fatalbanana
* Add maximum delay to ratelimit module
* Backport fix for empty files inclusion from libucl
* Fix settings id setup
* Add min_learns option to classifiers
* Use more clever to utf8 conversion strategy
* Fix disabling of virtual symbols in the settings
* Rework settings to work properly in metric-less configuration
* Set the default limit for classifier
* Fix ttl based expiration from LRU cache
* Rework DKIM module to use OpenSSL for digests
* Fix mailto urls parsing with hyperscan
* Do not set obscured flag for urls starting with spaces
* Fix crash on redis learn
* Fix ratelimit ctime setting

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* New DCC module (by @smfreegard)
* Rework whitelist module:
	- Now we check different elements for different checks
	- MIME from for DMARC
	- DKIM signature domain for DKIM
	- SMTP from or HELO for SPF
* Fix regexps results combination (*critical*)
* Fix issue with expressions processing (*critical*)
* Optimize strlcpy for aligned input
* Add support of half-closed connection in lua_tcp
* Allow to print compact json in client
* Save required score in history (#581)
* Allow to attach file descriptors to control commands
* Allow to send descriptors from workers to main
* Allow to attach fd when broadcasting to workers
* Implement log pipe feature for rspamd logs analysis
* Add `log_helper` worker
* Add `URIBL_SBL_CSS` (by @smfreegard)
* Add worker scripts functionality
* Add on load hooks for rspamd_config
* Add lua scripts for log_helper worker
* Add generic maillist detector (#584)
* Implement FANN autolearn using log_helper worker
* Rework metrics configuration to allow includes
* Change default value of forced removal in composite rules
* Allow to use assembly version of blake2b on x86 cpu
* Use less precise (but faster) clock if possible
* Insert redirected URL to the urls list
* Allow to get and set callback data for rspamd symbols
* Add binary heap implementation
* Use binary heap for expire algorithms in the hash
* Use `least frequent used` expiration strategy
* Allow to get mime headers from a task
* Add support for mime headers in `regexp` module
* Update Exim patches (by @fatalbanana)
* Allow building rspamd with jemalloc
* Save multipart boundaries
* SA plugin changes:
	- Properly handle MIME headers
	- Fix eval:check_for_missing_to_header rule
	- Implement SA compatible body regexps
	- Use sabody rules in SA plugin
* LUA API changes:
	- Add util.get_ticks function
	- Add util.stat function
	- Add task:get_symbols_numeric method
	- Add method to get number of symbols in the cache
	- Add lua methods to get redirected urls
	- Allow to get callbacks for lua symbols
	- Add config:set_symbol_callback function

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Use HTTP Content-Type on non mime input if possible
* Save log level when compressing log messages
* Further rework of composite rules (add '^' prefix)
* Add tracking for rspamd expressions
* Store actions limits in metric result
* Fix parsing of include/redirect with many records in SPF
* Add method to disable symbols execution in the cache
* Allow to disable checks from settings
* Allow to select settings by id in HTTP query
* Find URLs with '\r' and '\n' inside href attribute
* Implement vectored mode for hyperscan (experimental)
* Improve client connection errors diagnostics
* Allow to edit new files with signtool
* Improve hashes performance on 32 bit platforms
* Fix sorting of limits
* Remove slow and unused rules `INVALID_EXIM_RECEIVED*`
* Add expression:process_traced lua method
* Allow tables in task:insert_result
* Save trace for SA metas
* Do not parse broken TLD parts in URLs
* Investigate many border cases in URLs parser

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Add list support to `mime types` module configuration (by @moisseev)
* Allow symbols params to be printed in logs
* Fix `MIME_BAD_ATTACHMENT` false positives for MDN/DSN
* Fix crashes on arm32
* Do not classify message if some class is missing
* Fix cryptobox cleanup
* Remove multipart/report from bad mime types (#569)
* Improve logging for fuzzy hashes
* Show map URLs in webui
* Sort symbols in webui

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* New dynamic updates plugin
* Regular expressions map support
* Faster radix trie algorithm
* Faster siphash for AVX2 supporing CPUs (used in fuzzy hashes)
* PCRE2 support
* Allow quoted and slashed keys in map
* Add proper support of DNS resolvers balancing (#552)
* Rework includes and configuration system for better local changes support
* New keypairs framework for signing and encryption
* Added support for dynamic modules and workers
* Allow to dump configuration with help comments
* Rework once_received module
	- Fix priority for `good_hosts`
	- If a good host has been found do not add once_received symbols
	- Fix priorities for strict once_received
	- Add ability to whitelist IP addresses
* Implement support of signed maps for HTTP and file maps
* Add command to sync fuzzy storage (#533)
* Rework system of symbols and actions registration
	It is possible now to use priorities when adding symbols to metrics and
	override scores for symbols with lower priority with the scores with
	high priority.
* Add auth support and db selection for redis stats
* Improve composite rules application
* Add ignore_received option
* Fix critical issue with inconsistent resorting
* Fix `all` in spf redirects
* Add punycoded versions for IDN domains (#554)
* Improve sorting order for symbols cache
* Add lockless logging for processes management
* Allow to specify flags for metric symbols
* Load images height and width from style attribute (#538)
* Override DNS requests limits for SPF and DKIM
* Fix resetting symbols to their default values in WebUI
* Improve configuration agility for redis stats
* Allow to set db and password for redis in stat_convert
* Import the latest libucl
* LUA API changes:
	- Add rspamd_version function to LUA API
	- Add lua_cryptobox module
	- Add lua_map module
	- Add task:set_metric_action lua API method
	- Fix race condition in lua_tcp module
	- Fix a lot of issues in lua_redis module
	- Rework and abstract lua maps API
	- Add util.strlen_utf8 lua function
	- Add lua functions for caseless comparison
	- Allow optional symbols registration
	- Add config:add_map table form method, add regexp maps
	- Add task:has_urls method
	- Add task:has_flag method
	- Add html tags methods to lua_html
	- Add task:get_dns_req
* Plugins changes:
	- Add support for WLBLEval SA plugin
	- Use caseless comparison in SA and DMARC plugins
	- Allow SA plugin to set scores for rspamd symbols
	- Add regexp maps support to multimap
	- Allow filenames match in multimap
	- Add more filters for the existing map types
	- Fix html images rules to reduce FP rates
* New rules:
	- LONG_SUBJ - too long subject
	- MIME_BAD_ATTACHMENT - bad attachement type
	- RDNS_NONE - no reverse DNS record for sender's IP
	- Fix MISSING_MIMEOLE rule for modern OE
* Many other bugfixes, memory leaks plugs thanks to:
	- Coverity scan
	- New gcc-6 warnings
	- valgrind manual iterations
* Documentation improvements:
	- FAQ list: https://rspamd.com/doc/faq.html
	- Reworked quick start guide
	- Added documentation for all active modules
* Other changes:
	- Dropped Ubuntu Vivid support
	- Added Ubuntu Xenial support
	- Rework build system for rspamd and rmilter

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Print traceback on lua errors in lua config
* Fix leaks in lua error paths
* Improve 'R_EMPTY_IMAGE' rule
* Fix metas memoization in SA plugin
* Properly set `flag` in fuzzy replies
* Fix arguments order
* Fix issue with out-of-boundary reading
* Fix issues found by coverity
* Same result checking error found by coverity
* Fix varargs processing (found by coverity)
* Fix error in printing hex
* Reduce weights for some hfilter patterns
* Add aliases for task:get_from_ip:
	- task:get_addr
	- task:get_from_addr
	- task:get_ip
*  Rework once_received module
	- Fix priority for `good_hosts`
	- If a good host has been found do not add once_received symbols
	- Fix priorities for strict once_received
	- Add ability to whitelist IP addresses
* Fix `MISSING_MIMEOLE` rule for modern OE
* Treat meta tags as embedded tags (#501)

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix DSN rules when SMTP from is unavailable
* Fix statconvert routine to avoid lua module usage
* Set a sane quark for configtest to avoid NULL to be printed in logs
* Support c11 if available
* Fix parsing of ip:port strings
* Add more diagnostic for lua subr errors
* Fix task:set_from_ip lua method
* Add basic routines for digital signatures
* Add tool for digital signatures
* Add plain open file API method for atomic open
* Fix parsing nested braces inside logger vars
* Pre filters now actually skip processing
* Add pre-filter mode for multimap
* Switch to apache 2 license

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix stat_cache closing
* Add checkpoints to sqlite3 learn cache
* Do not recompile lua generated headers all the time
* Increase number of messages learned
* Fix issues with dual stack and hfilter
* Disable MID checks for hfilter by default
* Fix cache definitions in multiple classifier and no type
* Don't crash if learn cache failed to initialize
* Fix googlegroups support in maillist plugin
* Rework flags LUA API:
	- Allow to check for a specific flag
	- Add `learn_spam`, `learn_ham` and `broken_headers` flags
	- Unify internal functions
* Add `BROKEN_HEADERS` rule
* Add support for forged confirmation headers (by @AdUser)
* Allow `any`, `mime` and `smtp` for get_from/get_recipients
* Add mime types checking plugin
* Add rule to detect spammers attempts to cheat mime parsing
* Rework parsing of IP addresses in configuration (better IPv6 support)
* Add `util.parse_mail_address` function to LUA API
* Add lua sqlite3 module
* Implement synchronous redis call
* Ratelimit: avoid possible indexing of nil value (Fixes #498) (by @fatalbanana)
* Add stat_convert command to convert stats tokens from sqlite3 to redis
* Implement redis advanced lua api with pipelining
* Fix memory leak on redis stat (#500)
* Fix user/language learn count in sqlite statistics (#496) (by @fatalbanana)
* Fix build with custom pcre
* Fix fuzzy relearning (#498)
* Improve planning of asynchronous tasks
* Show slow rules in log
* Add warning for slow regexps
* Add base32 decode/encode routines to lua util
* Allow converting of learn cache from sqlite to redis
* Add methods to check if a messages has from/rcpts
* Improve and fix multimap plugin:
	- Restore 'header' maps
	- Add filters for headers
	- Add 'email:addr', 'email:user', 'email:domain' and 'email:name' filters
	- Add generic regexp filters
* Disable reload command in rc scripts
* Improve runtime CPU dispatcher for libcryptobox
* Add preliminary support of digital signatures via ed25519
* Add detection for RDRAND support
* Print configuration of crypto on start
* A in SPF presumes AAAA lookup as well

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix duplicated XBL symbol
* Reduce log severity for ratelimit missing servers
* Fix XBL composite to avoid duplicate symbols
* Reduce weight of URL_ONLY rule due to FP rate
* Disable fuzzy hashes from the metadata for now
* Fix processing of empty messages (#486)
* Always treat DNS timeouts as temporary fail for SPF
* Fix issue with SPF double IP stack (#483)
* Use X-Forwarded-For when checking secure_ip (#488)
* Fix hash calculation for sqlite stats
* Fix memory corruption on punycode
* Fix strings allocation in punycode
* Fix error message (#491)

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Incompatible change: sqlite3 and per_user behaviour:
	Now both redis and sqlite3 follows the common principles for per-user
	statistics:
	1) If per-user statistics is enabled check per-user tokens ONLY
	2) If per-user statistics is not enabled then check common tokens ONLY
	If you need old behaviour, then you'd need to use separate classifier
	for per-user statistics.
* Implement redis statistics backend and cache
* Implement autolearning for statistics
* Reworked statistics architecture from scratch
* Add hyperscan (https://github.com/01org/hyperscan) engine for regular
	expressions:
	- add lazy loader for hyperscan databases
	- rework regexp cache to have joint pcre/hyperscan scanning
	- implement hyperscan pre-filter support
	- add compilation guards for bad expressions
	- implement `rspamadm control recompile` command
	- implement hyperscan cache monitoring
	- slides: <https://highsecure.ru/rspamd-hyperscan.pdf>
* Implement flexible task logging
* Rework fuzzy worker:
	- it is now possible to run multiple fuzzy workers;
	- implement lazy writing as sqlite3 is bad at concurrent writing;
	- add retries for simple sql commands in fuzzy backend;
	- use fine-grained transactions for fuzzy;
	- implement new multi-pubkeys mode;
	- allow encrypted only storages;
	- rework statistics for fuzzy;
	- add `rspamadm control fuzzystat` command for extended statistics;
	- implement human readable output for the previous command;
	- add condition script for learning fuzzy storage;
* Various fixes to SPF:
	- fix `redirect` records;
	- fix domains when parsing mx/ptr/a records in includes/redirects;
	- fix issues with multiple addresses in SPF records;
	- ignore SPF results in case of DNS failure;
	- adjust TTL of records when resolving subelements of SPF records;
	- always select `v=spf1` line if it is available
	- do not cache records with DNS failure in subrequests;
	- ignore records with temporary fails during subrequests resolving;
	- fix `RDNS_RC_NOREC` support;
* Add clang plugin for static analysis:
	- implement static checks for `rspamd_printf` format strings;
* Add 'allow_raw_input' option for non-mime messages
* Recognize types using libmagic
* Fix parsing of IPv6 received headers
* Add new interface of communication between workers in rspamd
* Add support for named socketpairs
* Don't write URLs by default as it is too verbose
* Set status for HTTP replies
* Try load `rspamd.conf.override`
* Implement words decaying for text parts to limit many checks
* Improve support of SA rules and plugins:
	- add check_for_shifted_date and check_for_missing_to_header eval rules;
	- add 'check_relays_unparseable' support;
	- add `check_for_mime('mime_attachement')` function;
	- use new re_cache interface for all SA rules;
	- add support for `Mail::SpamAssassin::Plugin::MIMEHeader`;
	- add support of 'special' SA headers to `exists` function;
	- fix issue when SA metas contain other metas;
	- fix freemail rules;
* Many fixes to the URL parser
* Match any newline character in regexps
* Fix resolving of upstreams and detection of poor IPv6 configurations
* Parse upstreams selection algorithm from the configuration line
* Add `reresolve` command to the control interface
* Generate fuzzy hashes from task metadata (URLs and headers)
* Add method to check if IP is local and `local_addrs` option
* Implement forced timeout for delayed filters
* Disable fast path of pcre-jit as it seems to be broken
* Bayes fixes:
	- new normalizer function;
	- really use weights of tokens from the OSB algorithm;
	- restore multiple classifiers support;
* Rules changes:
	- add `R_SUSPICIOUS_URL` rule that detects obfuscated URL's;
	- improve empty image rule;
	- rework `FORGED_RECIPIENTS` rule;
	- reduce weight of `SUSPICIOUS_RECIPS`;
	- fix `*_NORESOLVE_MX` symbols in hfilter;
	- add `SUBJ_ALL_CAPS` rule with support of UTF8
	- add spamhaus SBL to uribl
	- fix `SUSPICIOUS_RECIPS` and `SORTED_RECIPS` rules
	- remove `R_TO_SEEMS_AUTO` as it generates a lot of FP;
	- add new Message-ID regexp for Thunderbird (by @moisseev);
* Plugins changes:
	- allow ratelimit plugin to set symbol instead of pre-result
	- support IP DNS black lists for URIBL (e.g spamhaus SBL);
	- drop deprecated SURBL bits (by @fatalbanana)
	- rename `JP_SURBL_MULTI` to `ABUSE_SURBL` (by @fatalbanana)
	- add `SURBL_BLOCKED` (by @fatalbanana)
	- add `CR_SURBL`
	- SURBL: allow fallthrough to default symbol (by @fatalbanana)
	- Settings: fix IP match (by @fatalbanana)
	- SURBL: add missing symbols to metric (by @fatalbanana)
	- allow processing images urls for SURBL
	- unconditionally disable SPF for authenticated users and local networks
* Rework ratelimit plugin
	- switch to `rates` instead of old and stupid strings to setup;
	- check if a bucket is zero and disable the corresponding limits'
	- turn off all buckets by default;
	- check either `rcpt` or `user` buckets, not all together'
	- document new `rates` and `symbol` options;
	- inform user about what buckets are used in the configuration;
* Add neural network **experimental** plugin
* Add a sample script to learn neural network from rspamd logs
* Add documentation strings support to rspamd:
	- add strings for the main configuration options;
	- document workers options;
	- add internal plugin options;
	- create `rspamadm confighelp` routine;
	- implement human readable output for the previous command;
	- add subtree search support;
	- add keyword search support;
* Documentation improvements, tutorials section, statistics description
* Many other minor and major bugfixes not noted here

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix spf redirects
* Fix domains when parsing mx/ptr/a records in includes/redirects
* Fix unfolded base64 encoding
* Fix GError use-after-free
* Do not rewrite the original url when using redirector
* Fix parsing of fragment in urls
* Fix processing of HTML tags
* Improve empty image rule
* Avoid long double type
* Fix tokens weights in OSB algorithm
* Improve debugging for bayes

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix settings application (#416)
* Fix another issue with fixed strings
* Fix hash function invocation
* Use the proper string for make_dns_request in lua_http
* Fix scan time output
* Update webui:
	- fix labels for greylisting
	- fix dimension of scan time

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Emergency fix in keyed blake2 to fix fuzzy hashes and encrypted password
* Support passwords longer than 64 symbols

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Add function to traverse AST atoms
* Allow dependencies on rspamd symbols for SA metas
* Fix memory corruption when timeout is removed in fuzzy check
* Fix encrypted fuzzy add processing
* Avoid use-after-free in controller session destructor
* Use session pool instead of task pool in fuzzy check
* Fix assembly in i386 mode (#413, #412)

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Plugged memory leaks in internet address object & html parser
* Fixed static build
* Fixed multiple sigchld processing
* Fixed deletion of signal events after event processing loop
* Fixed build on ARM (#404 - reported by @Gottox)
* Fixed setting the default mask for SPF.
* Fixed sanitisation of HTTP query values
* Fixed parsing of the last header in encrypted HTTP messages
* Additions and fixes for test suite & benchmarks
* Added openssl aes-256-gcm support to libcryptobox & HTTP server
* Implemented support for starting multiple HTTP servers
* Implemented batch accept in HTTP server
* Added module to get data from HTTP headers (#285 - reported by @msimerson)
* Added `rspamadm control` command
* Added ability to sort counters output.
* Added ability to specify custom headers for rspamc client
* Fix architecture detection
* Converted history storage to the UCL format
* Allow flexible number of rows in history
* Fix action badges in WebUI
* Add universal cryptobox hash API
* Migrated to the optimized blake2b implementation adopted from Andrew Moon
* Allow explicit loading of specific modules
* Always load settings module
* Allow to add symbols from settings
* Fix double free in the controller fuzzy learn command
* Avoid endless loop when cannot open sqlite db
* Updated libucl

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix build on i386
* Update CentOS7 service file patch (by @fatalbanana)
* Fix path to rspamadm in Debian init script (by @fatalbanana)
* Fix broken '_SC_GETPW_R_SIZE_MAX' on FreeBSD
* Fix portability issues
* Use cryptobox chacha for libottery
* Better support of 32 bit builds
* Fix header name tokens setup
* Fix levenstein distance method for words
* Add workaround for old libevent (#400)
* Fix microseconds in termination timer
* Fix some more issues with fixed strings
* Explicitly test CPU instructions even after CPUID call
* Do not check out of boundary memory
* Do not output broken emails
* Fix unknown symbols registration
* Handle SIGILL using longjmp
* Block signals when exiting event loop
* Fix incorrect allocation size
* Slightly optimize alignment
* Restore rspamd -t for compatibility
* Add more sanity checks for emails

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Add rspamd control interface:
	- support `stat` command to get runtime stats of rspamd workers
	- support `reload` command to reload runtime elements (e.g. sqlite3 databases)
* Rework curve25519 library for modular design:
	- add Sandy2x implementation by Tung Chou
	- fix CPU detection for variables loading assembly
	- add testing for curve25519 ECDH
* New fixed strings library
* Add `R_SUSPICIOUS_IMAGES` rule
* Enable mmap in sqlite3
* Use new strings in the HTTP code
* Improve google perftools invocation
* Improve performance profiling in http test
* Reorganize includes to reduce namespace pollution
* Allow specific sections printing in configdump command
* Rework workers signals handlers to be chained if needed
* Update socketpair utility function
* Add control_path option for rspamd control protocol
* Fix ownership when listening on UNIX sockets
* Rework signals processing in main
* Remove extra tools from rspamd (they live in rspamadm now)
* Remove global rspamd_main
* Add global timeout for the overall task processing (8 seconds by default)
* Sanitize NULL values for fuzzy backend
* Store NM between encrypt/decrypt
* Add textpart:get_words_count method
* Fix generic DNS request in lua
* Tune hfilter weights
* Add support of IPv6 in hfilter
* Fix parsing of HTTP headers with IP addresses
* Sync with the recent libucl
* Various minor bugfixes

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Add configdump routine to rspamadm
* Implement retransmits for fuzzy_check plugin
* Fix events processing for learning anf checking fuzzy hashes
* Avoid dependency on unneeded and uncompatible glib include
* Add `historyreset` command to the controller
* Fix loading of tokenizer config from dump (#389)
* Add sorting hints for the history
* Allow custom lua scripts for users/languages extraction (#388)
* Do not add FORGED_RECIPIENTS when 'To' is missing (#387)
* Do not add R_UNDISC_RCPT when 'To' is missing (#387)
* Add encryption to fuzzy check plugin
* Add encryption for fuzzy storage
* Add new epoch for encrypted fuzzy request
* Add encryption for `rspamd.com` storage
* Remove gmime processing for LDA mode as it is deadly broken
* Add routine to find end of headers position in mime messages
* Fix LDA headers folding
* Init libraries in rspamc client as well to avoid locale issues
* Avoid collision with locally installed includes
* Allocate and free memory with the same allocator in rspamadm (#385)
* Preserve expired fuzzy hashes counter
* Improvements in webui:
	- Add favicon.ico
	- Rework history table
	- Fix sorting for the history
	- Migrate to bootstrap 3 and jquery 2
	- Fix css bugs
	- Add glyphicons
	- Add reset history
	- Improve history buttons
	- Redraw graph to avoid display issues
	- Webui is now MIT licensed to match licensing policy of rspamd

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix piechart clean slice (#380)
* Fix controller crashes when GString is reallocated (#381)
* Correctly set locale before start
* Set C locale for numeric values
* Add rspamadm routine:
	- add `pw` command to manage passwords
	- add `help` command for displaying help
	- add `configtest` command to check configuration files
	- add `keypair` command for generating encryption keys
	- add `fuzzy_merge` routine to merge fuzzy sqlite databases
	- add a simple manual page for rspamadm
* Allow metric registration for composite expressions
* Add strict mode for configtest
* Add logger counters
* Save and show learned messages count (#383)
* Add `no_stat` flag
* Add `task:set_flag` and `task:get_flags` (#382)
* Enable foreign keys in sqlite3
* Remove orphaned shingles from fuzzy storage
* Optimize synchronization steps for fuzzy storage
* Allow delayed conditions registration
* Add lua API for conditions registering

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix critical bug in webui that prevents password from being sent
* Rework webui view:
	- Switch to d3.js for graphs
	- Improve piechart look
	- Rework colors for piechart
	- Fix layout for symbols
	- Fix refresh button
* Add descriptions for whitelist maps
* Fix build on arm (#379)
* Fix issue with the last element in the radix trie
* Add more tests for radix trie algorithm
* Allow to extract URLs from query strings of other URLs (#361)
* Initialize rrd fields before writing to file
* Fix double free if no password has been specified

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Add writing to rrd from the controller
* Fixed lots of bugs in rrd code
* Adopt new DNS API in hfilter plugin (by @AlexeySa)
* Allow only one controller process to manage rrd file
* Set event base for fuzzy calls
* Improve fuzzy IO errors logging
* Add rra extraction function to rrd library
* Add graph handler to the controller
* Cache correct passwords to avoid too high CPU usage when working with webui
* Controller sockets are owned by router do not export them to task
* Optimize logging by skipping hash table search if it's empty
* Fix loading issue whith broken statfiles
* Print assertions from glib to rspamd logger
* Load legacy `lua/rspamd.local.lua`
* Update webui with some fixes to learning and scanning

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Rework symbols processing:
	- Improve sorting logic for symbols
	- Organize processing into multiple stages
	- Added asynchronous watchers for symbols
	- Added ability to organize dependencies between symbols
* Fixed URL redirector:
	- Use optimized POE loop
	- Organize dependencies
	- Fix startup
* New sqlite3 backend:
	- Allow to have per-languages and per-user statistics
	- Allow sqlite3 to be used as statistics backend
* Store tokenizer configuration within statfiles
* Improve bayes statistics:
	- Use headers and images metainformation in bayes
	- Suggest using of pre-processed tokens for statistics
	- Fix tokens normalization for OSB algorithm
* Rewrite url parsing:
	- Fix numerous issues with url extraction and normalization
	- Fix mailto urls
* Fix settings plugin to allow custom actions scores
* Improve rbl plugin
* Allow capturing patterns in rspamd lua regexp library
* Add GTUBE support
* Fix spamc legacy support
* Add DKIM support to RBL module
* Fix issues with multiple DKIM signatures
* Fix issue if rspamd cannot create statfiles (#331)
* Rework parts and task structure:
	- Now text_parts, parts and received are arrays
	- Pre-allocate arrays with some reasonable defaults
	- Use arrays instead of lists in plugins and checks
	- Remove unused fields from task structure
	- Rework mime_foreach callback function
	- Remove deprecated scan_milliseconds field
* Add ip_score plugin support (not enabled by default):
	- Can check for asn/country and network using DNS lookups
	- Can store and load reputation from redis server
* Improve PARTS_DIFFER rule to count merely different words
* New HTML parser:
	- Parses HTML parts using a set of state machines
	- Extracts useful data and exports it to lua functions:
		+ Styles
		+ Images
		+ URLs
		+ Colors
		+ Structure elements
	- Added HTML rules for some checks
* New version of LUA DNS API
* Table versions of many functions in LUA API
* Improve rspamc client:
	- Print execution time
	- Allow executing of external commands and passing output to them
	- Allow mime output mode when rspamc alters message according to rspamd
		checks and send it to an external command or stdout
* Allow scanning of local files using HTTP requests
* Rework configuration system:
	- Rules are now moved from the $CONFDIR to $RULESDIR to avoid ambiguity
	- All modules configurations are now split in $CONFDIR/modules.d/* to
		simplify upgrades
	- Move hfilter to plugins
	- Allow plugins and rules to define default scores to simplify metrics
		setup
	- Include overrides for all modules to honor local/automatic parameters
	- Tune scores for many modules
* Rework and enable DMARC plugin
* Add whitelist plugin for SPF/DKIM/DMARC based whitelisting
* Add some common domains to whitelists shipped with rspamd
* Rework logging:
	- Now each log entry supports module name and a `tag`. Tag is used to
		identify unique objects (such as tasks) when checking log files
	- It is possible to turn on debugging for the specific modules
	- Systemd logging is fixed
* Improve spamassassin plugin.
	- Now headers are matched more like SA
	- Improve support of Message-ID
	- Add support of ToCc header type
	- Fix :addr and :name in headers regexps
* Resurrect rrd support code
* Save controller stats between restarts
* Fixed tonns of bugs
* Added tonns of minor improvements and features
* Added more unit tests
* Create functional tests framework
* Added documentation for missing modules
* Added rpm/deb repositories and scripts
* Updated WebUI and libucl externals

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix critical bugs in tokenization algorithm
* Write unit tests for tokenization
* Add documentation for lua_tcp
* Switch off legacy tokenization by default.
* Fix critical bugs in words normalization
* Add lua bindings to tokenizer.
* Implement storing of HTTP headers inside task
* Add lua API to accerss HTTP headers data
* Implemented base64 encoding suitable for MIME
* Use caseless hash and equal functions for HTTP request headers.
* Improve debian architectures support (by @dottedmag)

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Revert incorrect regexp change that broke the default rules
* Fix lua_tcp module

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix error on spawning unique workers.
* Add preliminary version of generic LUA TCP requests API.
* Use lua 5.1 if luajit is not available (Arm64, PowerPC, s390x etc)
* Fix fuzzy mime strings with only type.
* Improve thunderbird sanity checks.
* Fix critical bug on matching regular expressions.
* Make hiredis optional dependency.
* Fix multiple bugs in daemon reloading

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Restore utf8 validation for regular expressions to avoid crashes
* Fix symbols displaying in the interface
* Add symbol groups to the interface
* Fix maps ID parsing in the controller
* Add multimap and regexp modules documentation
* Backport fixes from libucl
* Fix debian package (by @dottedmag)
* Rework XXH32 invocations

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Add support of the fast and secure protocol level encryption:
	- curve25519 is used for key exchange;
	- chacha20/poly1305 cryptobox construction for bulk encryption;
	- zero latency overhead;
	- encrypting and balancing HTTP proxy worker
* Rework expressions and create new expressions library:
	- aggressive optimizations based on the abstract syntax tree;
	- abstract expressions support (regular expressions, functions, lua modules
		composites and so on)
	- New comparision and '+' operators support
	- New greedy algorithm to minimize execution time of expressions and
		all symbols
	- Dynamic expressions benchmark and reoptimizations
* Many improvements to the LUA API:
	- reworked logger module allowing to do pretty print of the most of lua
		types (including tables and userdata classes)
	- reworked lua redis and lua HTTP to support more features
	- added opaque type for passing large text chunks without copying
	- new regexp module with many auxiliary functions (e.g. `re:split`)
* LuaJIT is now the default requirement for rspamd allowing to speed up lua
	execution by a large margin (however, plain lua is still supported)
* New plugins:
	- spamassassin rules plugin that allows to load and re-use the most of
		SA rules natively
	- DMARC plugin that evaluates SPF and DKIM policies to the domain policies
	- many old plugins has been reworked to implement new features and improve
		stability
* New aho-corasic trie implementation from @mischasan that allows to load and
	use hundreds of thousands of patterns with no influence on load
* Support of PCRE JIT and PCRE JIT fast path modes that significantly improves
	the performance of regular expressions if supported by PCRE
* New URLs parser and extractor:
	- removed legacy code that was useless for url finding
	- reworked algorithms of URL parsing for more precise and accurate results
	- added top-level-domains tree from http://publicsuffix.org
	- improved emails parsing
	- removed many phishing false positives due to TLD tree check
* New statistics infrastructure:
	- created a separate layer of statistic library
	- improved OSB-Bayes by re-weighting tokens according to the original
		academic paper and `crm114` implementation, which reduced false positives
		rate significantly
	- created learn cache to avoid double learning of statistics and providing
		an efficient way to re-learn class for a message
	- created abstract layers for different statistics backends
	- implemented new tokenization algorithms with fast or secure (siphash)
		hashes to generate statistics features
* Reworked utf8 tokenization that previously corrupted all UTF8 words (minor
	incompatibility with old fuzzy hashes with utf-8 symbols)
* SPF module has been completely rewritten to support complex cases of
	`include` and `redirect` within SPF records
* DKIM module now supports multiple signatures
* Controller passwords can now be stored encrypted by `PBKDF2-HMAC` in the
	configuration file
* Many hand-written HTTP clients has been replaced with the common rspamd
	http module
* New test framework:
	- import lua `telescope` test framework
	- add unit tests for many rspamd modules and routines
	- create a unit test for each possible bug found
	- use luajit ffi for testing C code
	- added preliminary support of functional testing by creating tasks from lua
* Randomize hash seed to avoid certain hash tables vulnerabilities
* Documentation improvements:
	- added documentation for the vast majority of rspamd modules
	- added documentation for rspamd protocol
	- added documentation for the most of rspamd LUA extensions
* Fixed tonns of bugs and memory leaks
* Added tonns of minor features

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* New fuzzy check logic:
	- use shingles algorithm for fuzzy matching
	- use blake2 instead of md5 for larger output space
	- combine fuzzy and strict matching
	- allow to organize private storages by means of keys
	- preserve compatibility with previous versions
* New fuzzy storage:
	- use sqlite instead of own memory based hash tables
	- rework commands interface
	- add conversion from the old format
	- add fuzzy match by shignles
	- support old rspamd versions
* Add lemmatizing for words used in fuzzy hashes that allows to improve match
quality by using of the first forms of all words
* Rework language detection
* Fix several critical bugs, memory leaks and deadlocks:
	- memory leak in HTML nodes parsing
	- deadlock in logger code
	- deadlock in signals processing
	- crashes in fuzzy_storage
	- crashes in tokenizers if the input was empty
* Import new libucl with several bugfixes and improvements
* Support listening on ipv6 addresses only
* Fix macro expansion in SPF module
* Several bugfixes in DKIM module
* Add load headers support for mime parts to the lua API
* Add documentation for:
	- workers in general
	- fuzzy_storage worker
	- fuzzy_check plugin
	- mimepart and textpart lua API modules

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Apply boundary fix for dkim simple canonization
* Fix ping command
* Return nil if header was not found in lua_task
* Fix hang in upstreams revive logic
* Decode entitles when normalizing HTML parts
* Fix logic of finding URLs in HTML parts
* Do not include \0 into length of text when performing conversion to utf8
* Fix raw vs parsed reperesentations
	Raw parts are now:
		- decoded b64/qp, but *NOT* converted to utf-8
	Processed parts are now:
		- converted to UTF-8
		- normalized if needed (e.g. HTML tags are stripped)
* Rework DKIM canonization to line based
* Fix fuzzy hashes addding
* Use more specific hash function for fuzzy
* Fix leaking of iconv descriptors
* Fix PTR resolving in lua resolver
* Rework spf module.
	- Copy data to memory pool as cached record might be destroyed causing
	    freed memory being passed to the protocol output (use after free)
	- Allow SPF_NEUTRAL policy to be handled separately
	- Add R_SPF_NEUTRAL to the default config
* Rework `register_symbols` function
* Allow to disable components of hfilter

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix owner when creating folder /run/rspamd (by @sfirmery)
* Fix IP validity checks
* Decode URLs obtained from HTML tags
* Fix crash with unweighted upstreams
* Stop processing headers in parts
* Set sockaddr.sa_family properly when connectig to upstreams
* Fix reload issues in surbl and fuzzy_check (reported by @citrin)
* Fix timeouts in redirector
* Improve lua errors reporting
* Fix lua closures processing in libucl
* Rework calling of lua functions from regexp module
* Choose raw regexp for raw headers
* Rework conversion to utf since glib one is broken
* Ignore SGML style tags in html
* Fix old bug with non-capturing https urls
* Fix memory corruption on fuzzy reload (reported by @citrin)
* Fix percents display in rspamc
* Fix buffer update for DKIM
* Do not validate utf for raw headers

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix build under *BSD
* Detect HAN unicode script
* Implement language detection heuristic for text parts
* Fix time output in history
* Improve piechart coloring
* Fix \r\n conversion in DKIM module (reported by @citrin)
* Try to detect systems with no IPv6 support
* Fix multiple/single values in use settings (reported by @citrin)
*  Rework IP addresses in upstreams:
	- Select ipv4/unix addresses if they exist and use ipv6 for ipv6 only
	    upstreams (since the support of ipv6 is poor in many OSes and
	    environments)
	- Free IP list on upstream destruction
	- Add test cases for addresses selection
	- Allow adding of free form IP addresses to upstreams
* Fix endiannes in lua_radix search (reported by @citrin)
* Soft shutdown should also set wanna_die flag (reported by @citrin)
* Stop use-after-free in event loop termination
* Fix processing of very short messages in DKIM (reported by @citrin)
* Detect systems without shared mutexes
* Fix issues with PTR and MX elements in SPF parser (reported by @citrin)

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* New upstreams code:
	- simplify upstreams API;
	- unify strings parsing in upstreams definition;
	- add configuration options for the upstreams;
	- for failed upstreams re-resolve their addresses;
	- use all resolved addresses for an upstream (round-robin);
	- implement stable hashing and use it by default for upstreams;
	- add unit test for upstreams module.
* Rework signals processing in all rspamd workers:
	- signals are now processed in the event loop;
	- implement the most common signal handlers for all workers;
	- add callbacks for workers specific signal handlers
*  Fix critical issue with fuzzy storage:
	Fuzzy stroage could not save any hashes on termination due to bugged
	signals handling
* Fix roll history IP storage
* Rework ipv4/ipv6 handling in parsing addresses:
	    - turn off support of IPV6_V6ONLY socket option;
	    - create ipv6 socket prior to ipv4 one to handle systems with v6/v4
	    sockets enabled (Linux)
* Remove CBL as it's wholly included in Spamhaus XBL (by @fatalbanana)
* Remove nszones.com fake RBL (by @citrin)
* Fix upstreams interaction for fuzzy_check
* Verify spf PTR records (reported by @citrin)
* Fix spf MX records parsing
* Add compatibility for old libevent (by @yellowman)
* Sync bugfixes from libucl

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Convert all maps to the compressed radix trie
* Allow IPv6 addresses in IP maps
* Remove dynamic items support from symbols cache
* Allow hex encoded output of strings
* Fix bug with control connections count
* Process fuzzy weight correctly (reported by @fatalbanana)
* Remove extra reference retain of http connection on error
* Remove deprecated options from the default config
* Add `one_shot` attr to metric's symbols
* Doc: add documentation for metrics
* Add Upstart job to debian packaging (by @CameronNemo)
* Config: improve SURBL symbols descriptions (by @citrin)
* Config: reflect SURBL changes (by @citrin):
    - Outblaze removed, malware moved to separate list:
	http://www.surbl.org/news/internal/MW-malware-sublist-added-to-multi
* Fix C modules initialization on restart
* Treat single IP as a single IP in radix lists (reported by @citrin)
* Do not touch file and core limits if not asked explicitly (reported by @citrin)
* Improve logging for fuzzy errors
* Block SIGPIPE for HTTP writing
* Doc: update manual pages
* Fix HTTP connection termination
* Reduce default number of parallel requests to 8
* Sync with libucl include features

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

* Fix typo in stat output.
* Fix issues with includes crossing with the system includes
* Restore testing framework
* Add radix trie test suite
* Implement new path-compressed radix trie.
    - The performance benefit over the old algorithm is about 1.5 times.
        - Memory usage is significantly lower as well.
    - Now radix trie can accept any IPv4/IPv6 values
* Various improvements to the memory pools code
* Fix writing reply to a client when no filters are defined
* Write base32 encoded fuzzy
* Fix 'soft reject' action
* Fix rspamd reload and modules reconfiguration
* Fix subject rewriting for the default subject
* Fix states for processing task and pre-filters
* Fix issues with connection closing
* Fix crashes in rdns
* Fix ratelimit pre-filter
* Update exim patch.
        - Update to the recent exim version
        - Strip extra leading src/ from the patch
        - Remove sendfile since it was broken
        - Fix rspamd spam report for exim
* Improve documentation

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>

Signed-off-by: Vsevolod Stakhov <vsevolod@highsecure.ru>