Message4798

I removed my registry file so that GnuReadline does not kick in. The
registry file was:

   python.console=org.python.util.ReadlineConsole
   python.console.readlinelib=GnuReadline

That change alone did cause the beta 3 version to exit properly on a
CTRL+C. The RC3 version exhibits the same behavior (and the rev. 6450 as
well): clean exit on CTRL+C when the Readline console is not selected,
ugly exit when the registry file is present, and never the
'KeyboardInterrupt' behavior.