Merge remote-tracking branch 'upstream/master' into documentation

* upstream/master: (90 commits)
  [Fix] Plug memory leak in proxy
  [Feature] Do not print garbadge in --compact output
  [Fix] Fix encrypted proxy requests
  [Fix] Do not delete uninitialized events
  [Feature] Add protection against open files limit and accepting sockets
  [Fix] Another fix for redis timeouts
  [Fix] Fix order of initialization
  [Feature] Use file lock in logger to avoid deadlocks
  [Fix] Fix errors handling in the proxy
  [Fix] More fixes for redis refcounts
  [Fix] Initialize parser scripts properly
  [Fix] Try to fix issue in redis stats backend when task is closed
  [Fix] Fix usage of rdns reply structure
  [Fix] Fix symbol name for spf soft fail
  [Fix] Fix setting path for lua
  [Doc] Update regexp module documentation
  [Minor] Fix names
  [Fix] Add missing types
  [Feature] Implement braced regexp quantifiers
  [Fix] Implement new automata to skip empty lines for dkim signing
  ...