MCL 3.0: CL-HTTP also runs in multi-threaded mode under MCL
3.0. The MAC CL-HTTP server is considered beta test software when running MAC
Common Lisp 3.0. Contact Digitool, Inc.
for information on how to upgrade to MCL 3.0.
MCL 2.0.1 Although the server does run in single-threaded mode
under MCL 2.0.1, MAC CL-HTTP is unsupported and considered alpha test
in versions prior to MCL 3.0.