%BChanServ SET MLOCK%B allows you to lock channel modes either
on or off.

Syntax: %BSET%B %U#channel%U %BMLOCK%B %Umodes%U

The %Umodes%U parameter is constructed exactly the same way as
a %B/MODE%B command; that is, modes followed by a %B+%B are locked
on, and modes followed by a %B-%B are locked off.

%BWarning:%B  If you set a mode-locked key, as in the second
example below, you should also restrict who can join the channel.
(see %B/cs HELP LEVELS SET JOIN%B) Otherwise, anyone entering
the channel when it is empty will be able to see the key!

Examples:

    %BSET%B %U#channel%U %BMLOCK%B %U+nt-iklps%U
       Forces modes n and t on, and modes i, k, l, p, and
       s off.  Mode m is left free to be either on or off.

    %BSET%B %U#channel%U %BMLOCK%B %U+knst-ilmp%U %Umy-key%U
       Forces modes k, n, s, and t on, and modes i, l, m,
       and p off.  Also forces the channel key to be
       "my-key".

    %BSET%B %U#channel%U %BMLOCK%B %U+%U
       Removes the mode lock; all channel modes are free
       to be either on or off.
