Fix interrupted HTTP RPC connection workaround for Python 3.5+

qa/rpc-tests/test_framework/authproxy.py

@@ -125,6 +125,11 @@ class AuthServiceProxy(object):
                 return self._get_response()
             else:
                 raise
+        except BrokenPipeError:
+            # Python 3.5+ raises this instead of BadStatusLine when the connection was reset
+            self.__conn.close()
+            self.__conn.request(method, path, postdata, headers)
+            return self._get_response()
 
     def __call__(self, *args):
         AuthServiceProxy.__id_count += 1