Usage: channelgrouprename cgid={groupID} name={groupName}

Permissions:
  i_group_modify_power
  i_group_needed_modify_power

Description:
  Changes the name of a specified channel group.

Parameters:
  cgid : integer:id of channel group
  name : new name of the channel group

Example:
  channelgrouprename cgid=13 name=New\sName
  error id=0 msg=ok
