nghttpx: Log error_code when submitting RST_STREAM

src/shrpx_http2_upstream.cc

@@ -710,7 +710,9 @@ int Http2Upstream::rst_stream(Downstream *downstream,
 {
   if(LOG_ENABLED(INFO)) {
     ULOG(INFO, this) << "RST_STREAM stream_id="
-                     << downstream->get_stream_id();
+                     << downstream->get_stream_id()
+                     << " with error_code="
+                     << error_code;
   }
   int rv;
   rv = nghttp2_submit_rst_stream(session_, downstream->get_stream_id(),

src/shrpx_spdy_session.cc

@@ -582,6 +582,12 @@ int SpdySession::submit_rst_stream(SpdyDownstreamConnection *dconn,
                                    nghttp2_error_code error_code)
 {
   assert(state_ == CONNECTED);
+  if(LOG_ENABLED(INFO)) {
+    SSLOG(INFO, this) << "RST_STREAM stream_id="
+                      << stream_id
+                      << " with error_code="
+                      << error_code;
+  }
   int rv = nghttp2_submit_rst_stream(session_, stream_id, error_code);
   if(rv != 0) {
     SSLOG(FATAL, this) << "nghttp2_submit_rst_stream() failed: "