
Usage: /MODE <channel> [+|-]<modechars> <parameters>

Mode command is quite complicated and it allows channel operators to change 
channel mode.  <modechars> is one of the following:

  m           - channel is moderated (only channel operators talk)
  s           - channel is secret
  p           - channel is private
  l <number>  - channel is limited, where <number> is the
                maximum number of users allowed
  t           - topic limits, only the channel operators may 
                change it
  a           - channel is anonymous
  o <nick>    - Makes <nick> a channel operator
  i           - channel is invite only
  n           - No MSGs to the channel are allowed

A + or - sign determines whether the specifies mode should be added or 
deleted.  

