asyncio ipv6 localhost bug in python3.7+3.8

[lemoer]

There is a bug in python3.7 and python3.8, which affects pynet:

• https://bugs.python.org/issue36069
• https://bugs.python.org/issue35545

This patch fixes it:

--- /usr/lib/python3.7/asyncio/base_events.py.bak	2019-02-21 18:42:17.060122277 +0100
+++ /usr/lib/python3.7/asyncio/base_events.py	2019-02-21 18:49:36.886866750 +0100
@@ -942,8 +942,8 @@
                             sock = None
                             continue
                     if self._debug:
-                        logger.debug("connect %r to %r", sock, address)
-                    await self.sock_connect(sock, address)
+                        logger.debug("connect %r to %r", sock, (host, port))
+                    await self.sock_connect(sock, (host, port))
                 except OSError as exc:
                     if sock is not None:
                         sock.close()