Log Message:
emulators/atari800: Upgrade to version 2.2.1 from 2.1.0

Two years and a little over a month elapsed between the pkgsrc release
and the latest version 2.2.1 (5 May 2011).  There were hundreds of
changes, but the vast majority were bug fixes and improvements on
existing functionality.

The only major addition was implementation of IDE.

See changelog in DOC/ChangeLog for details.