s_assert requires some higher-level functionality that shouldn't be
present in ircd_defs.h. ircd_defs.h is used by ssld, which has no notion
of logging or sending IRC messages. Additionally, some of the headers
s_assert depends on result in conflicting definitions in ssld.c.
This change also fixes the compile when using --enable-assert=soft.
nenolod gave the thumbs-up to port ircd-seven banfowards to charybdis to spb
for a while, and people have asked about it. Might as well do it since it's a
slow weekend.
Note that as a side effect use_forward is removed from the config and
unconditionally enabled!
This compares two masks and returns whether the "new" is
more specific than or equal to the "old". The difference
with match() is that a '?' in "old" does not match a '*' in
"new".
This makes it impossible to connect hostmasked servers.
(This support didn't work well anyway, was incompatible
with TS6 and we never masked ourselves.)
