Log Message:
mail/rspamd: Update to 1.8.0.

- [Feature] Add arguments schemas to processors and extractors
- [Feature] Add functional selectors library
- [Feature] Add generic selector to reputation module
- [Feature] Add more ratelimits: by digest, by attachments data, by
  filenames
- [Feature] Add preliminary stop words detection support
- [Feature] Add pure Lua debugm function
- [Feature] Add schema validation for Redis settings
- [Feature] Add selectors combine function
- [Feature] Add some recursion protection to lua logger
- [Feature] Add support for Lua API tracing
- [Feature] Allow to apply schema to arguments
- [Feature] Allow to get dkim signing data directly from HTTP headers
- [Feature] Allow to reuse existing authentication results
- [Feature] Cache selectors results in re runtime
- [Feature] Implement new text tokenizer based on libicu
- [Feature] Integrate selectors framework to multimap
- [Feature] Relax FORGED_RECIPIENTS
- [Feature] Support (almost) all html entities
- [Feature] Support adding and deletion of recipients in the milter
  block
- [Feature] Support gathering HTTP body from fragments in lua_http
- [Feature] Support multi flag in regexp and glob maps
- [Feature] Support selectors in ratelimit module
- [Feature] Support selectors in settings
- [Feature] Use khash in HTML parser
- [Feature] Use pure Lua debugm function
- [Fix] Add fail-safety for destroying sessions
- [Fix] Allow to add result-less fake DNS records
- [Fix] Another try to fix race conditions on config unload
- [Fix] Call Lua callback on DNS timeouts
- [Fix] Deprecate task:inc_dns_req as it is redundant
- [Fix] Do not allow events deletions on cleanup
- [Fix] Do not try to process skipped messages
- [Fix] Fix HTTP requests with no body
- [Fix] Fix another cleanup race condition
- [Fix] Fix bug in processing of pcre regexps
- [Fix] Fix byte array allocation in the pool
- [Fix] Fix crashes on task cleanup
- [Fix] Fix dynamic buckets in ratelimits
- [Fix] Fix endless loop when waiting for Rspamd to stop
- [Fix] Fix lua_util.str_split in case of delimiters set
- [Fix] Fix more issues with watching of async events
- [Fix] Fix stop words detection and loading logic
- [Fix] Fix various corner cases for language detection
- [Fix] Fix watchers in lua_tcp
- [Fix] Fix words decay algorithm
- [Fix] Implement watchers replacement to handle nested calls
- [Fix] Save faked code into fake dns record
- [Fix] Show the proper frame when using lua_util.debugm
- [Fix] Use fake dns records in tests
- [Fix] Use unicode replacements for HTML entities
- [Fix] fixed "cannot find dependency on symbol 1" issue when using
  replaced symbols in spamassassin rules
- [Fix] partition_id is not available in old versions of CH
- [Project] Add implicit conversion logic to selectors
- [Project] Add initial support for selectors in regexps
- [Project] Add method concept
- [Project] Further changes in unicode operations
- [Project] Implement Clickhouse migrations
- [Project] Implement implicit conversions to userdata
- [Project] Implement insert method
- [Project] Implement selectors registration for regular expressions
- [Project] Implement selectors support in re_cache
- [Project] Improve language detector: cleanup unused files,
  categorize
- [Project] Migrate CH data to a fat table
- [Project] Rework selectors logic
- [Project] Start Clickhouse utilities library
- [Project] Start unicode rework
- [Project] coroutine threaded model for API calls: thread pool
- [Rework] Move phishtank to a DNS based service
- [Rework] Rework Clickhouse plugin to use the new API
- [Rework] Rework language detector
- [Rework] Rework utf content processing in text parts
- [WebUI] Add progress bar for AJAX requests
- [WebUI] Avoid errors table reinitialization
- [WebUI] Avoid history table reinitialization
- [WebUI] Avoid throughput summary table reinitialization
- [WebUI] Destroy summary table on disconnect
- [WebUI] Fix "auth" request URL
- [WebUI] Fix disabling and hiding controls on page reload
- [WebUI] Fix maps loading from neighbours
- [WebUI] Fix symbols sorting by score
- [WebUI] Fix tables destroying
- [WebUI] Fix throughput data consolidation
- [WebUI] Fix upload buttons disabling