ENH: Allow setting of ISO8601 via datepattern (default for systemd)
ENH: fail2ban-regex uses ISO8601 when using journal backend

Also fix setting of date pattern occurring too early, before filter
being created.
ENH+DOC: Allow setting of Epoch and TAI64N date pattern

Also add this to jail.conf man page
TST+BF: Fix bug in Filter.{get,set}DatePattern and improve tests
Merge pull request #364 from kwirk/journal-datedetector

ENH: Journal datedetector - fail2ban-regex date pattern setting