http: Don't use the normal http proxy mechanism for https

The tls protocol handles connections via proxies internally.

With TLS/SSL, the peer verification requires that the client
speaks directly with the server, since the proxy doesn't have
the remote server's private key.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/http.c

@@ -112,6 +112,7 @@ static int http_open_cnx(URLContext *h)
 
     if (!strcmp(proto, "https")) {
         lower_proto = "tls";
+        use_proxy = 0;
         if (port < 0)
             port = 443;
     }