Release 3.8.2

* [Feature] Add extraction type for `from` maps
* [Feature] Allow to add templates to redis history prefix
* [Feature] Implement dynamic keys map in fuzzy storage
* [Feature] Lua_url: Add `to_http` method
* [Feature] Support JSON logging when in syslog mode
* [Fix] Deal with `Connection` and `Host` headers on proxying
* [Fix] Encode headers in metadata exporter
* [Fix] Fix initial maps load
* [Fix] Make stat tokens allocation consistent
* [Fix] Resolve issue with bayes stat in `rspamadm` mode
* [Fix] Try to fix url path issue
* [Rework] Breaking: Do not report module as action
* [Rework] Use khash instead of glib hashes for many reasons
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