.\" .\" Copyright (c) 1992, 1993 .\" The Regents of the
University of California. All rights reserved. .\" All rights
reserved. .\" .\" This code is derived from software donated to
Berkeley by .\" Jan-Simon Pendry. .\" .\" 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. .\" 3. All advertising
materials mentioning features or use of this software .\" must
display the following acknowledgement: .\" This product includes
software developed by the University of .\" California, Berkeley
and its contributors. .\" 4. Neither the name of the University
nor the names o