Fail2Ban support for SOGo

Added SOGo rules fater lates feature in SOGo 2.0.5
(http://www.sogo.nu/bugs/view.php?id=2229)
Now fail2ban can monitor SOGo even behind a proxy (which is default for SOGo,
Without proxy, multilined regexp would habe been needed, this is obsolte as well.

I hope you like it and thanks to Steven Hiscocks for advising me to do this pull request.

Arnd Brandes