Copyright by David Howells 1996 (dwh@nexor.co.uk)

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met: 1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer. 2.
Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
