[Minor] Fix typo in config documentation in statistic.conf

Default pkg-config name of zstd is libzstd.pc. Let's add it to the
MODULES list.

It is now possible to use system xxhash since commits 23889da9ae
("[Minor] Update bundled xxhash") and 7ad02fc1f7 ("[Rework] Use xxh3
as a default hash and fix memory/alignment issues"). Let's give
packagers this possibility with a new SYSTEM_XXHASH option.

[Minor] Remove dangling comment

Reported and discussed with @moisseev

The dangling comment is result of commit bfe48b659b ("[Fix] Fix
logging for rspamadm"), where the same comment was removed from rspamadm
but this one stayed. It should be removed as well.

Issue: #4131

HAVE_SSSE3 preprocessor macro is not transferred to the fastutf8 library by CMake configuration. Thus, the function rspamd_fast_utf8_validate_sse41 is missing in rspamd-server shared library.

* [Conf] Score MIME_OBFUSCATED_ARCHIVE to 8 points
* [Conf] Set one_shot for URIBL rules by default
* [CritFix] Fix upstreams name resolution when there is also a port
* [Feature] Add ROC feature to neural network plugin
* [Feature] Add public suffic compilation utility
* [Feature] Add support of Cloudmark
* [Feature] Allow hyperscan for ppc64, as vectorscan now suports it.
* [Feature] Allow to skip DNS resolution for keep-alive connections
* [Feature] Aws_s3: Allow to store large parts separately
* [Feature] BIMI: Add preliminary version of the BIMI plugin
* [Feature] JSON endpoint for querying maps
* [Feature] Lua_magic: Add a sane CSV heuristic
* [Feature] Lua_mime: Add schema for message transfer
* [Feature] Output average scan time in /stat endpoint
* [Feature] Show average scan time in `rspamc stat` output
* [Fix] Add guards to avoid race condition on TCP connection
* [Fix] Allow spaces in DKIM key records
* [Fix] Apply the similar fix to the url_reputation
* [Fix] Avoid overwriting whitelisted_signers_map
* [Fix] Backport PR from libucl
* [Fix] Clear SSL errors
* [Fix] ClickHouse cleanup of old partitions
* [Fix] Do not double call error handler on ssl errors in the timeout path
* [Fix] Do not forget to clear pointers on IOC reset
* [Fix] External_relay: Remove useless check of the map value
* [Fix] Find suspicious url encodings that could break url extraction
* [Fix] Fix HTTP(s) client timeout
* [Fix] Fix exclude flags setting
* [Fix] Fix expanding of the variables
* [Fix] Fix host header usage in lua_http
* [Fix] Fix http maps shared memory cache cleanup
* [Fix] Fix logic in HTML processing FSM
* [Fix] Fix parsing of the compound mailto urls
* [Fix] Fix processing captures from pcre2
* [Fix] Fix removing from khash
* [Fix] Fix stuctured headers pushing
* [Fix] Further fix for i386 compilation
* [Fix] Improve duplicate settings error reporting
* [Fix] Lua: task:remove_result didn't work in some cases
* [Fix] Output service parts as well
* [Fix] Phishing: Deal with phishing + redirected URL
* [Fix] Phishing: Fix finding domains in the phishing map
* [Fix] Plug memory leak by using mempool for a copied address
* [Fix] Properly find the request and the number of requested entries
* [Fix] Rbl: Fix inversed logic of the url_full_hostname
* [Fix] Read file maps if they were not pre-read during preload
* [Fix] Restrict x86_64 assembly to x86_64
* [Fix] Return a real number of recipients when dealing with aliases
* [Fix] Rework unshedule DNS request function
* [Fix] Support definition of ungrouped symbol in conf file, use group info from lua or other conf file
* [Fix] Unschedule DNS request when clearing IO channel
* [Fix] When checking for phishing, we need to convert punicode -> UTF8, not vice versa
* [Fix] lua_cfg_transform - actions without score (discard)
* [Fix] lua_cfg_transform - silly break break actions
* [Fix] ratelimit - symbol per bucket
* [Project] BIMI: Fix helper integration issues
* [Project] Further DNS over TCP architecturing
* [Project] Rdns: Add more functions for TCP based requests
* [Project] Rdns: Add preliminary reading logic for TCP channels
* [Project] Rdns: Add reaper for inactive TCP connections
* [Project] Rdns: Add timeout logic for TCP requests
* [Project] Rdns: Do not treat TCP channels failure as fatal
* [Project] Rdns: Fix TCP connection mess
* [Project] Rdns: Fix TCP stuff cleanup
* [Project] Rdns: Fix various ownership issues
* [Project] Rdns: Implement TCP writing logic
* [Project] Rdns: Initial support of TCP IO channels
* [Project] Rdns: More fixes in TCP handling
* [Project] Rdns: Restore the previous EDNS0 size
* [Project] Rdns: Send truncated replies via TCP
* [Project] Rdns: Unregister TCP requests
* [Rework] Allow to restore SSL handlers after keepalive pooling
* [Rework] Allow to set a different behaviour for actions from settings
* [Rework] Include SSL flag into keepalive hash
* [Rework] Make `rspamadm dmarc_report` default behaviour more sane
* [Rework] Mempool: Use explicit alignment
* [Rework] Rdns: Use faster and more compact hash table for DNS requests
* [Rework] Rework SSL flag operations
* [Rework] Take disabled flag into account
* [Rework] Timeouts are now global per event and not reseted by IO activity
* [Rework] Use xxh3 as a default hash and fix memory/alignment issues
* [Rules] Fix old rules to stop global functions usage
* [Rules] Fix symbol for DKIM temporary failure
* [Rules] Remove ancient and inefficient rules
* [Rules] Slightly reduce MULTIPLE_FROM score

Suggested by: @citrin

Issue: #4117

Issue: #4078