Calls the Portmapper to unregister the specified program and
    version for all protocols. The program and version are removed
    from the list of active servers.
    Format
      #include  <rpc/rpc.h>
      void  svc_unregister(u_long prognum, u_long versnum);

1  –  Arguments

 prognum
    The program number associated with the server procedure.
 versnum
    The version number associated with the server procedure.

2  –  Description

    Removes all mapping of the double [prognum, versnum] to dispatch
    routines, and of the triple [prognum, versnum, *] to port number.

3  –  Return Values

    None