s3:smbd multichannel: let a cross-node session binding NT_STATUS_REQUEST_NOT_ACCEPTED

s3:smbd multichannel: let a cross-node session binding NT_STATUS_REQUEST_NOT_ACCEPTED

This is better than NT_STATUS_USER_SESSION_DELETED, as it means the
client can keep it's session alive. Otherwise a windows client believes
the whole session is gone and all other channels are invalid.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>