* 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>

If the first rule in A + B + C + D > X matched then it was counted like
`1 + 1` and not as `0 + 1` as the accumulator was incorrectly treated in
that case.

When converting to vectored mode we need to remember results between
consequent calls of regexp match engine. Prior to this patch this
behaviour was broken and caused regexp rules to be matched incorrectly.

Update Exim patches

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

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