modified:   ab3418commudp.c
	Added do_ab3418 option + logic for cases when the AB3418 serial port
	is not being used (i.e. not connected) and we want to read the SPaT
	message only.
	Changed name of FLASH_DONT_WALK to FLASH_DONOT_WALK so as not to conflict
	with the same #define in ab3418_libudp.c