BF: nagios fix
ENH: complete stock jail.conf to contain all filters
TST: ensure stock jail has all filters
Update check_fail2ban

Removed unnecessary reference to as yet undeclared $jail_name when checking a specific jail.
Update ChangeLog
ENH: add filter groupoffice. Closes gh-566
Credits for groupoffice
MRG: merge ChangeLog for nagios fix
Merge pull request #555 from grooverdan/nagios_fix

BF: nagios fix
Merge pull request #567 from grooverdan/groupoffice-filter

ENH: add filter groupoffice. Closes gh-566
ENH: jail.conf entry for groupoffice
Merge branch 'master' of https://github.com/fail2ban/fail2ban
Merge pull request #562 from grooverdan/jail.conf-complete_and_correct

ENH: Jail.conf now has all filters and TST: a mechanism to test this is truee