Fix a few issues with SERVLIST.•••- Implement support for service type matching based on the service
oper type. This isn't the same as irc2 but its close enough.
- Fix erroneously sending the mask in the <mask> field. This field
is for the service name mask not the service distribution mask.
Replace the SERVER stub command with something actually useful.•••This will typically never be reached because the remote will wait
until it receives a CAPAB response before sending SERVER. Instead
replace it with a CAPAB stub command that quits servers with a
helpful message.