httpconnection: properly inject ssl_wrap_socket into httpclient (issue4038)

This causes httpclient to use the same SSL settings as the rest of
Mercurial, and adds an easy extension point for later modifications to
our ssl handling.

mercurial/httpconnection.py

@@ -275,14 +275,13 b' class http2handler(urllib2.HTTPHandler, '
             if '[' in host:
                 host = host[1:-1]
 
-        if keyfile:
             kwargs['keyfile'] = keyfile
-        if certfile:
             kwargs['certfile'] = certfile
 
         kwargs.update(sslutil.sslkwargs(self.ui, host))
 
         con = HTTPConnection(host, port, use_ssl=True,
+                             ssl_wrap_socket=sslutil.ssl_wrap_socket,
                              ssl_validator=sslutil.validator(self.ui, host),
                              **kwargs)
         return con