Adds entries to the proxy database that give remote users an
    OpenVMS identity (account name). Applies to the NFS server, NFS
    client, PC-NFS, RSH, LPR/LPD, and customer-developed services.

    The proxy database contains communication proxies and NFS
    proxies:

    o  Communication proxy

       -  Provides an identity for users of RSH, RLOGIN,
          REXEC, RMT/RCD, LPR/LPD, and customer-written
          services, if these services are marked with
          SET SERVICE /FLAGS=APPLICATION_PROXY.

                                         NOTE

             The ROOT account does not require a communication
             proxy in the proxy database. The /FLAGS=APPLICATION_
             PROXY flag, therefore, is not relevant when you are
             setting up a communication proxy for a UNIX root
             account.

       -  Required qualifiers: /HOST, /REMOTE_USER.

    o  NFS proxy

       -  Provides an identity for users of NFS client, NFS server,
          PC-NFS. No two proxies can have the same UID and host
          combination.

       -  Required qualifiers: /HOST, /GID, /UID.

    You can combine NFS and communication proxies in one record.

    Related commands: SHOW HOST, DCL command AUTHORIZE, CONVERT/VMS
    PROXY, REMOVE PROXY, SHOW PROXY

    Format for Communication Proxies

      ADD PROXY  user { /HOST=host | /REMOTE_USER=user }

                 [ /PERMANENT ]

    Format for NFS Proxies

      ADD PROXY  user { /GID=n | /HOST=host | /UID=n }

                 [ /NFS=options ]

                 [ /PERMANENT ]