Release 1.2.4 * Implement new multipattern matcher that uses hyperscan if possible * Use mutlipattern for lua_trie code * Add utility methods for multipattern * Use multipattern in url matcher * Add escape functions for hyperscan * Allow to optimize lua -> C transition by flattening table args * Optimize hot paths in SA plugin * Optimize rspamd_re_cache_type_from_string * Allow empty tries * Fix extraction of URLs from Subject * Allow to have different flags for different patterns in multipattern * Add common directory for hyperscan cache to config * Implement caching for hyperscan multipattern * Attach domain part to `R_SUSPICIOUS_URL` (by @moisseev) * Allow multipattern scans to be nested for the case of hyperscan * Simplify SURBL redirector search code and avoid ac_trie * Add two way substring search algorithm * Avoid acism usage to find gtube pattern * Fix processing of empty headers * Allow to disable pthread mutexes on broken platforms * Make web interface not send password in query strings (#585) by @fatalbanana * Add maximum delay to ratelimit module * Backport fix for empty files inclusion from libucl * Fix settings id setup * Add min_learns option to classifiers * Use more clever to utf8 conversion strategy * Fix disabling of virtual symbols in the settings * Rework settings to work properly in metric-less configuration * Set the default limit for classifier * Fix ttl based expiration from LRU cache * Rework DKIM module to use OpenSSL for digests * Fix mailto urls parsing with hyperscan * Do not set obscured flag for urls starting with spaces * Fix crash on redis learn * Fix ratelimit ctime setting