user_external External user support

Use external user authentication methods like IMAP, SMB and FTP

Use external user authentication methods like IMAP, SMB and FTP 0.6.0 agpl Robin Appelman https://github.com/nextcloud/user_external#readme tools integration https://github.com/nextcloud/user_external/ https://github.com/nextcloud/user_external/issues https://github.com/nextcloud/user_external.git