Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

- bump the man page dates to the date of mandoc fixes

Reported by:	rpokala
X-MFC with:	094517119c62c23369d545a7475ae982d86330a3

- cannot parse date, using it verbatim: Dec 15, 1997"
- sections out of conventional order: Sh SEE ALSO
- possible typo in section name: Sh EXAMPLE instead of EXAMPLES
- AUTHORS section without An macro

MFC after:	3 days

- skipping paragraph macro: Pp after Sh
- sections out of conventional order: Sh EXAMPLES
- whitespace at end of input line
- normalizing date format

It allows one to trivially convert an absolute path to a relative path
and the reverse. The test programs themselves are very useful in scripts
but the real use comes shortly with the -r and -a arguments to ln.
These are sometimes known as the --relative and --absolute flags and
can force a symlink to be relative when you only have an absolue path.
Another place these are sometimes used is to add -a and -r args to 'realpath'.
Incredibly useful in Makefiles.

I was going to just add the files in with 'ln' but a library makes more sense.
The test programs may come out in their own right some day for scripting.

released under a BSD 2-clause:
 * Copyright (c) 1997 Shigio Yamaguchi. All rights reserved.
 * Copyright (c) 1999 Tama Communications Corporation. All rights reserved.

The test directry does not conform to any framework.
Not connected to build.
doc people may want to play with the manual pages.

Obtained from:  https://www.tamacom.com/pathconvert.html  Shigio Yamaguchi.
MFC after: 1 month
Relnotes:       yes
Sponsored by:   Panzura, Tama Communications Corporation