Release 1.5.7

Release 1.5.7

* [CritFix] Fix corruption when multiple fuzzy are defined
* [CritFix] Fix learn condition in fuzzy check
* [Feature] Add rules to detect bad 8bit characters in From and To
* [Feature] DKIM signing: sign_networks/local address specific
use_domain settings
* [Feature] Support numeric arguments for Redis requests
* [Fix] Deal with 8bit characters in email addresses
* [Fix] Fix couple of issues in FORWARDED rule
* [Fix] Fix passing data to log helper when many symbols defined
* [Fix] Fix R_BAD_CTE_7BIT rule
* [Fix] Fix REPLYTO_UNPARSEABLE rule
* [Fix] Fix setting of email address
* [Fix] Rspamadm grep: Disable Lua patterns in string search by default
* [Minor] Add Lua 5.3 workaround
* [Minor] Add lua methods to detect if a part has 8bit characters
* [Minor] Allow session-less lua dns requests
* [Minor] Allow to append greylist end time to message reported
* [Minor] Avoid `nil` table
* [Minor] Disable dkim_signing if redis is specified but not configured
* [Minor] Fix build with pcre2
* [Minor] Fix rule
* [Minor] Fix warnings
* [Minor] Format floating point number
* [Minor] Push email flags to the lua API
* [Minor] Silence some warnings
* [Minor] Silence warning
* [Minor] Try all hostname regexps to find the most significant one
* [WebUI] Fix add header filter in history

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