url: have httpsconnection inherit from our custom HTTPConnection

This will ensure that any customizations we perform to HTTPConnection
will be available to httpsconnection.

Differential Revision: https://phab.mercurial-scm.org/D4855

mercurial/keepalive.py

@@ -615,6 +615,10 b' def wrapgetresponse(cls):'
     return safegetresponse
 
 class HTTPConnection(httplib.HTTPConnection):
+    # url.httpsconnection inherits from this. So when adding/removing
+    # attributes, be sure to audit httpsconnection() for unintended
+    # consequences.
+
     # use the modified response class
     response_class = HTTPResponse
     send = safesend

mercurial/url.py

@@ -339,7 +339,7 b' class logginghttphandler(httphandler):'
         return logginghttpconnection(createconnection, *args, **kwargs)
 
 if has_https:
-    class httpsconnection(httplib.HTTPConnection):
+    class httpsconnection(keepalive.HTTPConnection):
         response_class = keepalive.HTTPResponse
         default_port = httplib.HTTPS_PORT
         # must be able to send big bundle as stream.
@@ -348,7 +348,7 b' if has_https:'
 
         def __init__(self, host, port=None, key_file=None, cert_file=None,
                      *args, **kwargs):
-            httplib.HTTPConnection.__init__(self, host, port, *args, **kwargs)
+            keepalive.HTTPConnection.__init__(self, host, port, *args, **kwargs)
             self.key_file = key_file
             self.cert_file = cert_file