Merge riastradh-drm2 to HEAD.

Use Mt for email addresses.

branches: 1.12.4; 1.12.26; 1.12.32;
Convert TNF licenses to new 2 clause variant

branches: 1.11.18;
Some cleanups, use more markup.

Make it parse old man pages, new mdoc pages, broken pages, and pages where
the synopsis line does not give us the section number. Add -w flag to print
pages we still don't like. Now we parse 99% of the pages properly.

branches: 1.9.6;
netbsd.org->NetBSD.org

Grammar and mdoc fixes.

If called without arguments, parse /etc/man.conf and regenerate the whatis
databases specified there. By default, the individual databases
are actually generated by forked children in this case, for
performance reasons. This feature can be switched off by new -f flag.
If the configuration file can't be parsed or doesn't contain any
_whatdb entries, the code falls back to /usr/share/man as before.

Added -C, which allows to specify alternate configuration file. This
is compatible with apropos(1) and whatis(1) flag of same name.

Update manpage accordingly and document behaviour a bit better.
Also add a HISTORY section, hopefully correct (done using CVS logs).

This solves toolchain/5231 by Tim Rightnour and bin/7696 by Allen Briggs.

Whitespace nit, mark up AUTHORS section, use standard headers, sort sections, end sentences with dots.

Replace shell script for creating whatis.db database with a C program
which is a little bit faster.

branches: 1.4.4;
* remove duplicate inode entries, so files with multiple hard links are
only parsed once; results in a 33% speedup on a p5-200
* order SEE ALSO by section

use the updated getNAME(8) now that it has a reasonable output. this
makes makewhatis several orders of magnitude faster for manual sources,
as we now avoid a costly `nroff -mandoc' for each one...

branches: 1.2.2;
- Fix .Nm usage.
- Use .Ar to refer an argument.

Add makewhatis.8.
Closes PR 1809 by Robert Dobbs <banshee@gabriella.resort.com>