Merge branch '2.3' into 2.4

.gitignore

@@ -59,3 +59,11 @@ CLion project files
 .reviewboardrc
 # vscode
 .vscode
+
+# Build directories
+/debug*/
+/release*/
+/package*/
+
+# Emacs
+TAGS

server/modules/routing/readconnroute/readconnroute.cc

@@ -570,6 +570,8 @@ void RCRSession::handleError(GWBUF* errbuf, DCB* problem_dcb, mxs_error_action_t
 {
     mxb_assert(problem_dcb->role == DCB::Role::BACKEND);
     mxb_assert(problem_dcb->session->state == SESSION_STATE_STARTED);
+    MXS_INFO("Server '%s' failed", problem_dcb->server->name());
+
     DCB* client_dcb = problem_dcb->session->client_dcb;
     client_dcb->func.write(client_dcb, gwbuf_clone(errbuf));