Author: Kev <klmitch@mit.edu>

Author: Kev <klmitch@mit.edu>
Log message:

Fixes for 3 bugs:

1) /mode <nick> -o wasn't propagated; the privileges were being set before
   send_umode_out() could get at them, so the PRIV_PROPAGATE setting went
   away.

2) /mode #channel +b banmask, under certain circumstances, would allow
   multiple bans of the exact same mask to be added to the channel.

3) /mode #channel +b banmask would leak memory if another ban of the exact
   same mask was already present on the channel (and bug #2 wasn't
   triggered).

Testing:

Compiled and ran; unable to duplicate the errors, now.

git-svn-id: file:///home/klmitch/undernet-ircu/undernet-ircu-svn/ircu2/trunk@382 c9e4aea6-c8fd-4c43-8297-357d70d61c8c