%BChanServ MODE%B does everything that the regular IRCd MODE
command does, but allows you to do so if you're not currently
opped in the channel.

Syntax: %BMODE%B %U#channel%U <%U+modes-modes%U> [%Uparams%U]

Example: MODE #Support +tn
         MODE #Support +ootn hAtbLaDe XYZ
