[IRCServices] A ilttle suggestion for set mlock

[Ekim Engin]

The idea was the use of =mode
To unset a mode, and as in this case the = operator has to be be
inculded into the first character check (done to disinguish between +
and -), so it is not important if the check is =+ or += 
Also from the programming view of things ;-)

The use Strider said makes not to much sense to me, as the compatibility
to scripts and users should not be changed.

Greets

Ekim