Indicates the channel modes available and which types of arguments they do or do not take.
Also see: MAXLIST
Format: CHANMODES=<A>,<B>,<C>,<D>
CHANMODES=<A>,<B>,<C>,<D>
Examples:
CHANMODES=b,k,l,imnpst
CHANMODES=beI,k,l,BCMNORScimnpstz