NAME
        SetNVProtection -- set the protection flags. (V40)

   SYNOPSIS
        success = SetNVProtection(appName, itemName, mask, killRequesters);
        D0                        A0       A1        D2    D1

        bool setnvprotection(strptr, strptr, long, bool);

   FUNCTION
        Sets the protection attributes for an item currently in the
        nonvolatile storage.

        Although 'mask' is long only the delete bit, nvef_delete/nveb_delete,
        may be set. If any other bits are set this function will return
        FALSE.

        The strings appName and itemName may not contain the '/' or ':'
        characters. It is recommended that these characters be blocked
        from user input when requesting AppName and ItemName strings.

   INPUTS
        appName - NULL terminated string indicating the application name
                  to be matched. Maximum length is 31.
        itemName - NULL terminated string indicated the item within the
                   application to be found. Maximum length is 31.
        mask - the new protection mask. Only set the delete bit otherwise
               this function WILL CRASH.
        killRequesters - suppress system requesters flag. TRUE if all system
                         requesters are to be suppressed during this function.
                         FALSE if system requesters are allowed.

   RESULT
        success - FALSE if the protection could not be change (ie the data
                  does not exist).

   SEE ALSO
        getnvlist(), <libraries/nonvolatile.h>