Document r271234, mrsas(4) enabled in GENERIC for amd64 and i386.
Document r271234, mrsas(4) enabled in GENERIC for amd64
and i386.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation

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