- gc configure patch since it hasn't been required since introducing
--without-permcheck in configure, despite the comment in Makefile.
- Some of Defaults.py are now upstream defaults.
Remove FLAVORs:
- Rewrite src/common.c:check_caller() for the cgi/mail wrapper to now
look at the defined group membership instead, _mailmanq (a new group).
This allows the administrator to switch mail servers and web servers
without requiring a FLAVOR for each combination; but rather, by simply
adding the cgi/mail user to the _mailmanq group. This is a diversion
from upstream, but will be proposed. At least sthen@ and dlg@ agree to
go in this general direction.