do not rewrite to top root index.php

[ArtificialOwl]

The idea is that on a setup of Nextcloud in a subfolder of the website, even with a Redirect from /.well-known/ to /nextcloud/.well-known the current .htaccess will try to reach /index.php instead of looking the local index.php

At the root of the domain:

Redirect "/.well-known/" "/nextcloud/.well-known/"

Rewrite will not work because the pathInfo is out of Nextcloud, the only way to fix this would be to add

	if ($pathInfo === '/.well-known/webfinger') {
		return $pathInfo;
	}

in https://github.com/nextcloud/server/blob/master/lib/private/AppFramework/Http/Request.php#L770

[juliusknorr]

Would make sense then to also support this for the dav related well-known urls here