censor user credentials in logs by default

src/CommandCensorData.hh

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <stdint.h>
+
+#include <utility>
+
+#include "Version.hh"
+
+std::pair<const void*, size_t> censor_data_for_client_command(Version version, uint16_t command);