Fixed bug on Python 3.4 where unpacking 2 lists in argument doesn't

work.

Turns out unpacking multiple lists in a function's argument is new in
Python 3.5 (PEP 448).

ptadapter/relays.py

@@ -122,8 +122,8 @@ def close(self):
             wait_list.append(self._server)
         for conn in self._connections:
             conn.cancel()
-        yield from asyncio.gather(*wait_list, *self._connections,
-                                  return_exceptions=True)
+        wait_list.extend(self._connections)
+        yield from asyncio.gather(*wait_list, return_exceptions=True)
 
 
 class ProxyNegotiator():
@@ -327,4 +327,4 @@ def _negotiate_proxy(self, sreader, swriter):
         else:
             raise ProxyNegotiationError(
                     'Malformed SOCKS5 reply {!r}'.format(buf))
-        self._logger.debug('SOCKS5 negotiation complete')
+        self._logger.debug('SOCKS5 negotiation complete')