asyncio: Add support for UNIX Domain Sockets.

Lib/asyncio/events.py

@@ -220,6 +220,32 @@ class AbstractEventLoop:
         """
         raise NotImplementedError
 
+    def create_unix_connection(self, protocol_factory, path, *,
+                               ssl=None, sock=None,
+                               server_hostname=None):
+        raise NotImplementedError
+
+    def create_unix_server(self, protocol_factory, path, *,
+                           sock=None, backlog=100, ssl=None):
+        """A coroutine which creates a UNIX Domain Socket server.
+
+        The return valud is a Server object, which can be used to stop
+        the service.
+
+        path is a str, representing a file systsem path to bind the
+        server socket to.
+
+        sock can optionally be specified in order to use a preexisting
+        socket object.
+
+        backlog is the maximum number of queued connections passed to
+        listen() (defaults to 100).
+
+        ssl can be set to an SSLContext to enable SSL over the
+        accepted connections.
+        """
+        raise NotImplementedError
+
     def create_datagram_endpoint(self, protocol_factory,
                                  local_addr=None, remote_addr=None, *,
                                  family=0, proto=0, flags=0):