Change back various occurrences of \*[Le], \*[Ge] (less/greater equal)
and \*(ua (upwards arrow) to literal "<=", ">=" and "^" whenever
appropriate (e.g., in code examples).

Remove workaround for ancient HTML generation code.

branches: 1.12.56;
Convert TNF licenses to new 2 clause variant

branches: 1.11.2; 1.11.4;
Fix bit pattern error in example.
Reported by Edward Tomasz Napierala in PR port-sun3/38181.

branches: 1.10.18; 1.10.24;
Removed accidental repetitious words.

Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

Use Fd in SYNOPSIS.

Fix Bd arguments, unquote Sh argument, sort sections.

change:
.Sh "SEE ALSO"
to:
.Sh SEE ALSO
The doc macros check for the latter (actually just for 'SEE' as the first
argument to .Sh) to set the section header SEE ALSO flag, which modifies
some behaviour (e.g. references done with .Rs/.Re).

More and more of .Os cleanups. .Os is defined in the tmac.doc-common file,
so we shouldn't override it with versions in the manpages. Many more to
come.

mdoc(7) & nroff cleanup, plus some additional references

macroize BSD, NetBSD, FreeBSD and misc cleanup

Man page for der Mouse and Gordon Ross's /dev/leds diagnostic LED interface.