Clean up main program call.
Clean up main program call.

Switch to using $MAIN_PROGRAM instead of $0 and move it to a guard clause
instead of a block.

Signed-off-by: brian m. carlson <738bdd359be778fee9f0fc4e2934ad72f436ceda@crustytoothpaste.net>

bk2204/daniel-ruby,bk2204/daniel-ruby