GRP_MDN

Purpose:        Moves group down in group list

Input Syntax:   GRP_MDN <name>

Input Params:   <name>    CHAR(10)  = group name

Output Syntax:  [+|-]<message>

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

Right required: R_GROUP_ADD or R_GROUP_EDIT

Implementation: f4adp_group.c / f4adp_grp_mdn()
