Bahamut and ircu both send 005 MODES and ELIST so this is entirely
unnecessary. The other IRCd checked for here is for a dead network.
While we're editing this code fix HexChat on servers that can only
support one mode at a time (these are mostly gateway servers).
This implements support for the full 005 numeric syntax including negation and value escapes as defined in draft-hardy-irc-isupport-00. This fixes HexChat on servers that:
- Have unloaded a previously supported feature at runtime (e.g. unloading the monitor module in InspIRCd removing the MONITOR token).
- Have escaped spaces in the network name (see testnet.inspircd.org for an example of this).
- Send a value for a token where HexChat expects none (e.g. INVEX on InspIRCd — the value for this token is optional) or vice versa.
Sadie Powell
