Documentation for server_url added

README.md

@@ -35,7 +35,8 @@ Examples:
                 login_search_dn=>"cn=admin,dc=wikimedia,dc=de",
                 login_search_suffix=>"dc=wikimedia,dc=de",
                 login_search_password=>"123",
-		login_method=>"search" # or "listi or search allowed"
+                login_method=>"search" # or "list or search allowed",
+                server_url=>"ldap://localhost:389",
             }
         }
     }