Clarify the reason to not use the volatile string as an argument to CTR macros. Note the logging of file and line.
Clarify the reason to not use the volatile string as an argument to CTR
macros. Note the logging of file and line.

Reviewed by:	dchagin
MFC after:	3 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase