rc-1

The first release candidate.
The code base is believed to be very stable at that point,
and hence not many development is going on here.

• Rework Alpha Waves and Alone in the Dark hacks to be more
  in line with what MS-DOS does (these progs resize PSP to 0
  and then terminate it... among other bad things)
• Boot protocol extension to allow skipping the particular
  letters when assigning drives
• Stop reporting MSDOS-7.1 version to the programs, as FreeDOS
  did. Programs from that MSDOS distribution will now print
  "Incorrect DOS version"
• Fix nasty bug to allow Volkov Commander to work