Synopsis:
   scan [#channel] [pattern] [-sort songs|speed]

Description:
   SCAN returns a list of users on the specified channel.  The current 
   channel is used if no channel is specified. This scan is taken from the 
   internal lists kept for each channel, which means there is no lag.

Examples:
   To show all users on the current channel:
      /scan

   To show all users on a channel with pattern:
      /scan *luna*

   To show all users on a channel sorted by songs:
      /scan -sort songs #alternative
