https://rathena.svn.sourceforge.net/svnroot/rathena/!svn/bc/15775/trunk/conf/groups.conf
<commands>
A group of settings
<command name> : <bool>
or
<commandname> : [ <bool>, <bool> ]
First boolean value is for atcommand, second one for charcommand. If set to
true, group can use command. If only atcommand value is provided, false is
assumed for charcommand. If a command name is not included, false is assumed for
both atcommand and charcommand.
For a full list of available commands, see: doc/atcommands.txt.
Command names must not be aliases.