HTTPS request timeout optimalization

If we already have a connection 5 second should be enough,
else leave time for connecting to server.
Goal is to fail faster if some reused HTTPS connection was idle
for way too many time and it is actually not working anymore.

Author: baranyaib90

src/https_client.c

@@ -319,7 +319,7 @@ static void https_fetch_ctx_init(https_client_t *client,
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_USERAGENT, "https_dns_proxy/0.3");
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_FOLLOWLOCATION, 0);
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_NOSIGNAL, 0);
-  ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_TIMEOUT, 10 /* seconds */);
+  ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_TIMEOUT, client->connections > 0 ? 5 : 10 /* seconds */);
   // We know Google supports this, so force it.
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
   ASSERT_CURL_EASY_SETOPT(ctx, CURLOPT_ERRORBUFFER, ctx->curl_errbuf); // zeroed by calloc