Removes a backtranslation softlink subentity from the session control
    database on the specified node.

    delete  [node node-id] session control -
            backtranslation softlink softlinkname

    Note that this command does NOT remove the softlink from the DECdns
    namespace, which may be done using the DNS$CONTROL.  The softlink
    must be removed from the DECdns namespace in order to prevent other
    nodes from using this backtranslation.  In other words, until the
    softlink is corrected in the DECdns namespace, other nodes may use
    this backtranslation softlink, thus associating this address with the
    wrong target node.

    Example:

    delete session control backtranslation softlink -      ! Represents
       DEC:.DNA_BACKTRANSLATION.%X49.%X0004.%XAA0004007413 ! DECnet
                                                           ! address 24.36

    delete session control backtranslation softlink -  ! On OpenVMS only,
       DEC:.DNA_BACKTRANSLATION.%XA1725E3E             ! deletes the
                                                       ! softlink for
                                                       ! IP address
                                                       ! 161.114.94.62