This requires client-side support too.

Change-Id: I5197ed3ed2b8244b50f7faf84a1cadde6a61b2cb
Reviewed-on: https://gerrit.libreoffice.org/19917Reviewed-by: Andrzej Hunt <andrzej@ahunt.org>
Tested-by: Andrzej Hunt <andrzej@ahunt.org>
(cherry picked from commit 0b5991e4)