BF: fix infinite recursion case in Action.substituteRecursiveTags
ENH: add substition tags to filter definitions. Closes gh-539
DOC: document addition of filter options substitution into failregex/ignoreregex
ENH: fix fail2ban-regex for filter arguement substition
MRG: from python-actions
correct overprune on imports to filterreader.py
BF: datepattern handling in fail2ban-regex
MRG: filter substition
Merge branch '0.9' of https://github.com/fail2ban/fail2ban into 0.9