Should we make this a config.ini setting:

[mailgw]

# If leave_body_unchanged is set to no, roundup attempts
# to strip signatures. If the recognized signature is less than
# max_signature_length lines, it will be removed. Otherwise the
# signature will be kept.
max_signature_length = 10

Also should there be a minimum value like 3 or 4?

0 should be invalid (set leave_body_unchanged to yes or new
to disable)

-- rouilj