and keep the current legacy ownership behaviour when welding the
legacy backend

Change-Id: I7e1f90f2d235abf0e10062b4be11ba5150bbdbfb
Reviewed-on: https://gerrit.libreoffice.org/49918Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>