Added ability to register/login through LDAP

- Added ability to edit LDAP settings and whether to use LDAP or not in the users tab in the settings

backend/appdata/default.json

@@ -36,7 +36,15 @@
     },
     "Users": {
       "base_path": "users/",
-      "allow_registration": true
+      "allow_registration": true,
+      "auth_method": "internal",
+      "ldap_config": {
+        "url": "ldap://localhost:389",
+        "bindDN": "cn=root",
+        "bindCredentials": "secret",
+        "searchBase": "ou=passport-ldapauth",
+        "searchFilter": "(uid={{username}})"
+      }
     },
     "Advanced": {
       "use_default_downloading_agent": true,