Joins the global (name starts with #), local (name starts with &), or modeless (name starts with a +) channel named <channel-name>.  If no prefix is given, # is assumed.  Provides the key <key> if specified.
Joins the global (name starts with #), local (name starts with &), or modeless (name starts with a +) channel named <channel-name>.  If no prefix is given, # is assumed.  Provides the key <key> if specified.