gh-101317: Add ssl_shutdown_timeout parameter for StreamWriter.start_tls()

Lib/asyncio/streams.py

@@ -378,15 +378,17 @@ async def drain(self):
 
     async def start_tls(self, sslcontext, *,
                         server_hostname=None,
-                        ssl_handshake_timeout=None):
+                        ssl_handshake_timeout=None,
+                        ssl_shutdown_timeout=None):
         """Upgrade an existing stream-based connection to TLS."""
         server_side = self._protocol._client_connected_cb is not None
         protocol = self._protocol
         await self.drain()
         new_transport = await self._loop.start_tls(  # type: ignore
             self._transport, protocol, sslcontext,
             server_side=server_side, server_hostname=server_hostname,
-            ssl_handshake_timeout=ssl_handshake_timeout)
+            ssl_handshake_timeout=ssl_handshake_timeout,
+            ssl_shutdown_timeout=ssl_shutdown_timeout)
         self._transport = new_transport
         protocol._replace_writer(self)
 

Misc/NEWS.d/next/Library/2023-01-26-01-25-56.gh-issue-101317.vWaS1x.rst

@@ -0,0 +1 @@
+Add ``ssl_shutdown_timeout`` parameter for ``StreamWriter.start_tls()``.