Support a comma-separated list of architectures for the arch= attribute.  This change is necessary in order for the release documentation to scale to support more than two architectures.
Support a comma-separated list of architectures for the arch=
attribute.  This change is necessary in order for the release
documentation to scale to support more than two architectures.

Based on work by:	hrs

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