Log Message:
Update mcabber to 0.9.5.
Changes since 0.9.4 are:
* Implement internal hooks: post-connect, pre-disconnect
* Extend command /source; any command can be used in a sourced file
  once mcabber is running
* [OTR] New option 'otr' (to enable OTR support in the conf. file)
* [OTR] Disable OTR encryption for non-user contacts
* [SSL] Do not connect when the SSL settings can't be used
* [MUC] Add "/room names --detail"
* Add command /roster item_toggle_lock
* A group name can be specified in the /group command
* [UI] Remove the restriction on the message sizes for displaying
  incoming messages
* History logfile: Use a special code (MI) for local MUC info messages
* Usual misc. improvements and bugfixes
* Update Polish translation