Fix bug in payload reallocation function; correct length of payload
was not always copied.
+2019 November 13; version 1.12.1
+ New message type constants added to support A1.
+
2019 November 4; version 1.11.0
Version bump to move away from the 1.10.* to distinguish between
release A and the trial.
+2019 November 7; version 1.12.0
+ Version cut to support continued development for next release
+ preserving the 1.11.* versions for release 1 (Amber) and
+ related fixes.
+
2019 October 31; version 1.10.2
Provide the means to increase the payload size of a received message
without losing the data needed to use the rmr_rts_msg() funciton.