ENH: Realign and harmonise log messages with getF2BLogger helper
ENH: Log unhandled exceptions to Fail2Ban log
ENH: Tweak naming of getF2BLogger, and ensure consistent use
ENH: Rename fail2ban_excepthook to excepthook
BF: Fix getLogger for single level log level names
Merge branch 'kwirk/harmonize-log-msgs'

Conflicts:
	ChangeLog - Keep all additions