Add a few checks to groupserv/flags. Restrict +f from +Fing themselves. Prevent +f-F from removing founders. Prevent removing the last founder of a group. Make sure +Fs always have +f.
memoserv/delete: Only accept numeric indexes.
chanserv/sync: Return after kicking for RESTRICTED
chanfix: Restrict registering scored channels.

If /msg chanfix chanfix would work, only allow users it could possibly
op to register the channel. This is still fairly lenient.

There is no override at this time (other than unloading chanfix);
problem channels can be RESV'ed.
chanfix: Use a separate iteration state for a nested patricia iteration.

An iteration over the channel's metadata was started and finished using
the same mowgli_patricia_iteration_state_t as the iteration over all
channels.

As a result, a log message resulted:
(patricia.c:513) [mowgli_patricia_foreach_next]: mowgli_patricia_foreach_next(): called again after iteration finished on dtree
and the chanfix db was likely incomplete.

closes #76
Add a stub BSDmakefile that redirects to gmake.