+#define ENV_NAME_ONLY "RMR_SRC_NAMEONLY" // src in message is name only
+#define ENV_WARNINGS "RMR_WARNINGS" // if == 1 then we write some, non-performance impacting, warnings
+#define ENV_SRC_ID "RMR_SRC_ID" // forces this string (adding :port, max 63 ch) into the source field; host name used if not set
+#define ENV_LOG_HR "RMR_HR_LOG" // set to 0 to turn off human readable logging and write using some formatting
+#define ENV_LOG_VLEVEL "RMR_LOG_VLEVEL" // set the verbosity level (0 == 0ff; 1 == crit .... 5 == debug )
+#define ENV_CTL_PORT "RMR_CTL_PORT" // route collector will listen here for control messages (4561 default)