NAME
        AddDosEntry -- Add a Dos list entry to the lists (v36)

   SYNOPSIS
        success = AddDosEntry(dlist)
        D0                     D1

        long adddosentry(struct doslist *)

   FUNCTION
        Adds a device, volume or assign to the dos devicelist.  Can fail if it
        conflicts with an existing entry (such as another assign to the same
        name or another device of the same name).  Volume nodes with different
        dates and the same name CAN be added, or with names that conflict with
        devices or assigns.  Note: the dos list does NOT have to be locked to
        call this.  Do not access dlist after adding unless you have locked the
        Dos device list.

        An additional note concerning calling this from within a handler:
        in order to avoid deadlocks, your handler must either be multi-
        threaded, or it must attempt to lock the list before calling this
        function.  The code would look something like this:

        if (AttemptLockDosList(LDF_xxx|LDF_WRITE))
        {
                rc = AddDosEntry(...);
                UnLockDosList(LDF_xxx|LDF_WRITE);
        }

        If attemptlockdoslist() fails (i.e. it's locked already), check for
        messages at your filesystem port (don't wait!) and try the
        attemptlockdoslist() again.

   INPUTS
        dlist   - device list entry to be added.

   RESULT
        success - Success/Failure indicator

   SEE ALSO
        remdosentry(), finddosentry(), nextdosentry(), lockdoslist(),
        makedosentry(), freedosentry(), attemptlockdoslist()