* Remove 2 memory leaks

* Add new command line parameter '-V' allowing to dump all variables of rspamd

* Improve test for fuzzy hashes
* Add new object - TextPart to perl XS library that allows access to stripped parts and fuzzy hashes
* Add documentation for expressions parser and fot Mail::Rspamd::TextPart
* Allways calculate fuzzy hash for text parts
* Store text parts separately from other parts
* Add compare_parts_distance for expressions that calculates difference in 2 parts messages
* Do not try to substitute variables in empty strings

* Add test case for fuzzy hashing check

* Do not write info about redirects to log file as this info is already in redirector's log file

* Parse expressions with state machine which allows different kinds of arguments in expressions
* Fix test to accord current data
* Add support of fucntions to regexp module
* Move all regexp logic to separate file, describe its API
* Fix descriptors leakage in surbl module

* Set "C" locale on start to avoid some troubles with logging

* Add warnings when we got errors while parsing rexeps

* Update documentation

* Create listen sock for lmtp in main processes dispatcher to allow multiply lmtp workers
* Fix logic of logging

* Add ability to define variables in modules blocks
* Add symbolic aliases for statfile sections

* Add documentation for rspamd regexp module

* Change logic of statfile pool:
  - statfiles hash is no longer shared hash as we have per-process uniq things like current section or offset in statfile
  - introduce shared hash of statfiles mmapped areas to avoid multiply mmaps of the same file

  - move memcached servers setting to config hash
  - eval config file before any actions
  - move daemonization code after all subs
  - fix searching in domains for redirector's check

* Add more strict login
* Add new header Queue-ID to protocol
* Log message id or queue id
* Add config file for redirector
* Add ability to set regexp and domains list to check with redirector

* Lower debug level for some errors (INFO to DEBUG)

 - NULL string when trying to check url regexp
 - double free of message byte array as mime_stream frees memory in array if it thinks that stream is
   owner of array's memory

  totally impossible in that code)

* Do not write to log file if we cannot open it

* Do not write to log if we don't do any read operation in dispatcher library