Syntax: %bSET <channel> TOPICLOCK {ON|OFF}%b

If TOPICLOCK is ON, %C will not allow anyone
without access to change the topic on <channel>.
The only way to change the topic with TOPICLOCK enabled
is %b/topic <channel> <topic>%b, by an identified user
with TOPIC level access.
Alias: %bTLOCK%b
