+2020 August 4; Version 4.2.1
+ Add additional environment variable dump if RMR_LOG_VLEVEL set to
+ 4 at start.
+
+2020 August 3; Version 4.2.0
+ Add support for the RMR_RTREQ_FREQ environment variable to control
+ the request frequency for a new route table (default 5s if not
+ supplied). (RIC-630)
+
+2020 July 21; Version 4.1.4
+ Fix bug in SI95 -- possible use of pointer after free (RIC-626).
+
+2020 July 9; version 4.1.3
+ Allow RTS messages to be sent before the arrival of the initial
+ route table. Calls to RTS (heart beat responses) prior to the
+ initial route table load could cause a crash if a framework
+ blindly assumes that RTS is valid. (RIC-589)
+