Fix client - Support multiple domains (Step 5/?)

src/civetweb.c

@@ -15132,7 +15132,7 @@ mg_close_connection(struct mg_connection *conn)
 		mg_free(client_ctx);
 		(void)pthread_mutex_destroy(&conn->mutex);
 		mg_free(conn);
-	} else if (client_ctx->context_type == CONTEXT_HTTP_CLIENT) {
+	} else if (conn->phys_ctx->context_type == CONTEXT_HTTP_CLIENT) {
 		mg_free(conn);
 	}
 #else