Release 1.6.4

* [Feature] Add method to get all content-type attributes in Lua
* [Feature] Add some sanity checks for actions and controller
* [Feature] Allow randomly select User-Agent from a list
* [Feature] Deal with obscured URLs with @ symbols
* [Feature] Milter headers: support adding/removing arbitrary headers from config
* [Fix] Add another workaround to display history properly
* [Fix] Add missing rspamadm control options to help
* [Fix] Auth-Results: Multiple DKIM signatures
* [Fix] Crash in URL processing
* [Fix] Default monitoring domain for surbl plugin
* [Fix] Detection of maillist optimized and fixed
* [Fix] Do not cache SPF records with PTR elements
* [Fix] Fix blacklists and DMARC in whitelist
* [Fix] Fix exceptions list in surbl
* [Fix] Fix processing of closed tags
* [Fix] Fix PTR processing in SPF
* [Fix] Lowercase HTTP headers to make them searchable from Lua
* [Fix] options.local_networks setting
* [Fix] Ratelimit: lowercase email addresses
* [Fix] Rebalance and slightly rework MX check plugin
* [Fix] Redis script loading in DMARC; URL tags; URL reputation
* [Fix] Reject invalid bh for DKIM signatures earlier
* [Fix] Remove incorrect method `task:set_metric_subject`
* [Fix] Rewriting subjects via force actions module
* [Fix] RPM postinstall
* [Fix] Treat 'rewrite subject' as spam action
* [Fix] Try harder to find urls
* [Fix] Use full URL when making an HTTP request
* [Fix] Use raw urls when sending requests to redirector
* [Fix] Use weight from map for fuzzy scoring
* [Rules] Penalise R_BAD_CTE_7BIT for utf8 messages
-----BEGIN PGP SIGNATURE-----
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=iqmA
-----END PGP SIGNATURE-----