PRT_SET

Purpose:        Set port number for service

Input Syntax:   PRT_SET {a|p|s} <port>

Input Params:   a|p|s  CHAR(1)    = which port to change
                                    (admin, primary, secondary)
                port   INT32      = new port number

Output Syntax:  +<message>

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

Right required: R_PORT

Implementation: f4adp_server.c / f4adp_port_set()

Remarks:        Port number 0 means to unbind the port (disable the service).
                Changes take effect immediate
