Play Duskbloods v1.0.2

Play Duskbloods 1.0.2

Fixed

• A closed session kept its port busy. The packaged launcher runs each local server as a wrapper
  plus a child process, and closing the launcher or the game only stopped the wrapper, so the real
  server kept port 18443 until it died by itself. A new launch then failed or took a long time to
  notice the old one was gone. The launcher now stops the whole process tree, waits for the port to
  be released, and when starting waits up to 15 seconds for a previous session to let go instead of
  failing at once.

Also in this build (from 1.0.1)

• Linux support (Play-Duskbloods-linux.tar.gz, see the README).
• Fixes for the WinError 1337 startup crash, the "internet connection is required" message caused by a
  saved VPN adapter name, and the Failed to bind to address 127.0.0.1:18444 error.
• Replaces the broken test build that showed NameError: name 'Pathsafe_is_file' is not defined:
  if you see that error, download this version.