avoid treating HTTP redirections or status codes generated in jsonrpc2 functions as error exceptions

gluon/tools.py

@@ -4475,6 +4475,8 @@ class Service(object):
                 return return_response(id, s)
             else:
                 return ''
+        except HTTP, e:
+			raise e
         except Service.JsonRpcException, e:
             return return_error(id, e.code, e.info)
         except BaseException: