m (master) someone who has access to almost every feature of the bot
n (owner) someone who has absolute control -- you generally only want one or two people to have this flag
t (botnet) someone who has access to all features dealing with the botnet
x (xfer) someone who has access to the file transfer area of the bot (if it exists) and can send and receive files to/from the bot
j (janitor) someone who can perform maintanence in the file area of the bot (if it exists) -- like a "master" of the file area
c (common) marks a user who is really just a public irc site from which any number of people can use irc, making the user@host information useless
p (party) someone who has access to the party line
b (bot) marks a user that is really a bot
u (unshare) user record is not sent to other bots
h (hilite) use nice bolds & inverse in the help files?
Also, there are 26 user-defined flags numbered A-Z (capitals). Bots can have additional flags which are explained later on. The channel flags for the bot are: (these can also be applied globally, or on a channel-specific basis)
o (op) someone who can ask for channel op (+o) status on the channel at will
d (deop) someone who is not permitted to ever gain channel op status
k (kick) someone who should be kicked if they ever attempt to join the channel
f (friend) if revenge mode is on, the bot won't take revenge on someone with this flag
m (master) someone who has the ability to add/delete/modify users on the channel
n (owner) someone who owns the channel
a (auto-op) automatically op the person when they join the channel even if the channel isnt +autoop
v (auto-voice) automatically give this person a voice it they join a +autovoice channel.
q (quiet) do not allow this person to get a voice on a +autovoice channel