By mapping the .odt, .sxw, .doc and .docx extensions to sdbc:writer:. If
we are at it, also accept xlsx next to xls.

Change-Id: I8c6769b282adec1e7e8d191170e7aa9b324f2018
Reviewed-on: https://gerrit.libreoffice.org/40147Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>