Ooops.  Back out changes to main.c from r235094.
Ooops.  Back out changes to main.c from r235094.

This change is specific to BeagleBone; I need to figure out how to
generalize this before committing.

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