Testing md5home (#26854)

[LukasReschke]

• Allow clearing default user backends in config.php

When specifying "user_backends" in config.php, a new option "default"
when set to false will prevent the default user backend to be
registered. The default one is the database backend.
This makes it possible to select exclusive user backends from apps.

• Testing app provides test user backend for alternative homes

The backend provide md5 result to getHome()

• Only md5 the user home when it's not the admin

Signed-off-by: Lukas Reschke lukas@statuscode.ch

From owncloud/core#26854

[mention-bot]

@LukasReschke, thanks for your PR! By analyzing the history of the files in this pull request, we identified @rullzer, @icewind1991 and @blizzz to be potential reviewers.

[schiessle]

Not sure if I understand this correctly, this is only used for testing right? In this case I would prefer to keep the app out of the main (productive) repository and put it in a separate repository instead.

[LukasReschke]

Not sure if I understand this correctly, this is only used for testing right? In this case I would prefer to keep the app out of the main (productive) repository and put it in a separate repository instead.

The app is already in the main repo and used for some other stuff: https://github.com/nextcloud/server/tree/master/apps/testing

Advantage of having it here is that we don't have to commit to the testing app repo once a day to trigger a CI build to verify that the stuff still runs. I don't have any big feelings about this one here.