User mode matching flags (specifying one of these means that only clients
with that umode are considered, what is not specified is always matched):
+ d Join-delayed channel members
o Irc operator
[In the future more flags will be supported, basically all
usermodes plus the +/- specificators to revert the filtering]
t : Include the querytype in the reply
u : Include userID with eventual ~
a : Include account name
+ o : Include oplevel (shows 999 to users without ops in the channel)
And the ,<querytype> final option can be used to specify what you want the
server to say in the querytype field of the output, useful to filter the