[PATCH] Fix check for further exotic protocols

[PATCH] Fix check for further exotic protocols

...that were added in 59891cd3985469bc44dbd05c9fc704eeb07f0c78 "look at
'embedded' protocols for protocols that support them"

Change-Id: I42836d6fd27cd99e39ab07e626053f002a2651f5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/178047
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <stephan.bergmann@allotropia.de>
(cherry picked from commit 8075798b22f2188530f57b8747589923bfd419ef)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/178065
Tested-by: Caolán McNamara <caolan.mcnamara@collabora.com>
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/178166
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Gbp-Pq: Name Fix-check-for-further-exotic-protocols.diff