ison nickname v1 is on channel v2
isop nickname v1 is an op on channel v2
ishop nickname v1 is a halfop on channel v2
isvoice nickname v1 has a voice on channel v2
isreg nickname v1 is a normal nick on channel v2
ischan if v1 is a channel which you are on.
isban if v1 is a banned address in internal ban list
if ($nick isop $chan) { do stuff }
if (#channel ischan) { do stuff }
