• If the COMSPEED is set to 0, then don't try to initialize the serial port and assume that the BIOS has set it up for us. This allows folks with a serial-aware BIOS to set the BIOS to speeds above 9600 and allow boot0 to just use the existing settings.
• Purge some gratuitous cpp comments as per style(9).

Submitted by: Danny Braniss danny at cs dot huji dot ac dot il (1)
MFC after: 1 month