url: don't ignore timeout for https connections

For http, we use the stdlib's HTTPConnection.connect which passes the
timeout down to socket.create_connection; for https, we override the
connect method but weren't handling the timeout, so connections could
hang for hours even with http.timeout set to low values.

mercurial/url.py

@@ -327,7 +327,9 b' if has_https:'
             self.cert_file = cert_file
 
         def connect(self):
-            self.sock = socket.create_connection((self.host, self.port))
+            self.sock = socket.create_connection(
+                (self.host, self.port), self.timeout
+            )
 
             host = self.host
             realhostport = self.realhostport  # pytype: disable=attribute-error