Release 1.4.2

Release 1.4.2

* [CritFix] Deal with absent headers in DKIM
* [CritFix] Do not trust remote shingles count
* [CritFix] Fix headers selection in DKIM verification
* [Feature] Add EXT_CSS rule
* [Feature] Add toggle for disabling SURBLs
* [Feature] Extend redis lock when learning spawned
* [Feature] Parse <link> HTML tags
* [Fix] Avoid reusing g_error (Fixes #1262)
* [Fix] Do not reset loaded ANN when learning is requested
* [Fix] Fix another issue with external deps in SA
* [Fix] Fix body trie matching
* [Fix] Fix checking of DKIM bodies that needs just `\n` to be added
* [Fix] Fix fuzzy hashes count
* [Fix] Fix keys names
* [Fix] Fix length calculations for url encoded urls
* [Fix] Fix matching of the same patterns from different tries
* [Fix] Fix name of var
* [Fix] Fix parsing of URLs with spaces and other bad chars
* [Fix] Fix probability calculations for fuzzy redis backend
* [Fix] Fix signing headers creation in DKIM
* [Fix] Plug memory leak
* [Fix] Really fix chained SA dependencies
* [Fix] Really increase lock lifetime
* [Fix] Use checksum to avoid intersection between different ANNs
* [Fix] Use rspamd hashes in embedded ucl
* [Fix] Yet another change for testing external deps

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