Release 1.8.1

Release 1.8.1

* [CritFix] Fix options insertion
* [CritFix] Fix words decay one more time (affects long messages)
* [CritFix] Increase default words_decay
* [CritFix] Plug memory leak in redis pool
* [Feature] Add `check_violation` feature to DKIM/ARC signing
* [Feature] Add only unique elements to Clickhouse url arrays
* [Feature] Allow `g+:` and `g-:` composite atoms
* [Feature] Allow dkim domains check in surbl
* [Feature] Allow maps with HTTP auth
* [Feature] Allow to disable actions by users settings
* [Feature] Extend whitelisting options
* [Feature] Store url object in images
* [Feature] Use verdict instead of the plain action in plugins
* [Fix] Allow to call fstring append with NULL string
* [Fix] DCC - luacheck
* [Fix] Do not load torch on each rspamadm invocation
* [Fix] Fix boundaries detection and rework stop words algorithm
* [Fix] Fix dependencies for DNS_SIGNED symbol
* [Fix] Fix errors when dealing with dynamic rates/bursts in Ratelimit
* [Fix] Fix groups mess
* [Fix] Fix groups mess
* [Fix] Fix parsing address with comments
* [Fix] Fix resolving in DMARC reports
* [Fix] Fix various issues with parsing of the received headers
* [Fix] Fix watchers issue in lua_tcp when doing no resolving
* [Fix] Plug memory leak in language detector (affects reloads)
* [Fix] Remove one letter stop words
* [Fix] Slashing: backport chunk logic from libucl
* [Fix] Stop libevent from using cached time in rspamadm
* [Fix] Try to fix watchers chaining
* [Fix] Various fixes in redis sync interface
* [Fix] ip_score - respect check_authed and check_local settings from config
* [Project] Rework passthrough actions
* [Project] Clustering module
* [Rework] Always create result for a task
* [Rework] Completely rewrite DMARC checks logic
* [Rework] Rework and fix whitelist plugin
* [WebUI] Add symbols sorting buttons
* [WebUI] Change symbols order without updating history
* [WebUI] Colorize symbols
* [WebUI] Do not display password form when secure_ip is set
* [WebUI] Fix symbol description tooltips display
* [WebUI] History: add sorting by symbol score value

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