GRP_ADD

Purpose:        Creates a new group

Input Syntax:   GRP_ADD <name> <gid>

Input Params:   <name>    CHAR(10)  = group name
                <gid>     INT32     = group id, "-0" for next free id

Output Syntax:  [+|-]<message>

Output Params:  <message> CHAR(128) = human-readable message

Implementation: f4adp_group.c / f4adp_grp_add()

Right required: R_GROUP_ADD
