v1.5.0: Merge pull request #204 from nextcloud/release-v150-stable13
- Fix redirect loop in case a user was disabled
- query LDAP for user data during auto-provisioning in case "Only allow authentication if an account is existent on some other backend" is enabled
- add attribute mapping for the users quota
- add option to use the local user back-end (and LDAP) in parallel to SAML