WS cleanups
headers: added has_invalid_header

renamed some camelCase methods
refactored a couple blocks into functions
moved config checking/loading into functions where used
headers: strip Return-Path header in incoming mail

read the comments. It's complicated.
headers: refactored each function into a data_post hook
Merge pull request #425 from msimerson/headers

Changes committed - thanks Matt.  Looks much better now.

BTW - when you fix up something we've commented on and you then think it's ready - can you make another comment on the request to that effect as Github doesn't send notifications when you add additional commits and it means that I'll notice quicker ;-)
geoip: added too_far setting
geoip: s/1/true/, note distance units are km

fixed s/ParseFloat/parseFloat/
auth/flat: disallow AUTH unless private IP or TLS
Merge pull request #431 from msimerson/flat

Merged. Ta.
Merge pull request #424 from msimerson/geoip

Merged - ta.