indent: indent multi-line expressions according to parentheses

This reverts the FreeBSD change from 2004-02-12 that had been imported
on 2019-04-04.

indent: do not report broken lines, report configuration on stderr

indent: sync manual page with recent changes

indent: fix definition of -cli in manual page

See io.c, compute_label_indent.

indent.1: sort options alphabetically

New sentence, new line. Whitespace fixes.

Upgrade indent(1)

Merge all the changes from the recent FreeBSD HEAD snapshot
into our local copy.

FreeBSD actively maintains this program in their sources and their
repository contains over 100 commits with changes.

Keep the delta between the FreeBSD and NetBSD versions to absolute
minimum, mostly RCS Id and compatiblity fixes.

Major chages in this import:

- Added an option -ldi<N> to control indentation of local variable names.
- Added option -P for loading user-provided files as profiles
- Added -tsn for setting tabsize
- Rename -nsac/-sac ("space after cast") to -ncs/-cs
- Added option -fbs Enables (disables) splitting the function declaration and opening brace across two lines.
- Respect SIMPLE_BACKUP_SUFFIX environment variable in indent(1)
- Group global option variables into an options structure
- Use bsearch() for looking up type keywords.
- Don't produce unneeded space character in function declarators
- Don't unnecessarily add a blank before a comment ends.
- Don't ignore newlines after comments that follow braces.

Merge the FreeBSD intend(1) tests with our ATF framework.
All tests pass.

Upgrade prepared by Manikishan Ghantasala.
Final polishing by myself.

branches: 1.26.16;
Remove trailing whitespace.

Remove double space before [.,:] in macro arguments.

Add the [n]ei and [n]eei options to the synopsis; already documented in
description.

port the -ut / -nut options from freebsd. -ut (default) enables tabs
in output, the -nut uses spaces.

branches: 1.22.8;
Remove a few unneeded Pp macros.

branches: 1.21.2;
Remove unnecessary Bk/Ek pairs from SYNOPSIS.
No effective change except where I used the opportunity to sort options
and/or option descriptions.

branches: 1.20.6;
Spell out parenthesis. From Ryo HAYASAKA in PR 44372.

Remove physical markup.

branches: 1.18.30;
When marking up "C", use .Tn consisntently. From YOMURA Masanori in private mail.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

.Nm does not need a dummy argument ("") before punctuation or
for correct formatting of the SYNOPSIS any longer.

.Pp not necessary before or after .Ss/.Sh.

Correct a minor nroff nit.
This closes PR bin/9220.

Correct one typo in the patch from PR 9220.

Commit patch from PR 9220 to document all options, and consistently
document defaults. Also, clean up nroff nits.

Remove a spurious .ne.

More and more .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.

Clean up SYNOPSIS formatting.

WARNSify, fix .Nm usage, deprecate register, use <err.h>, KNFify (with indent!;)

merge lite-2.

RCS ID police

fix formatting of example; PR #1535

Fix spelling errors.

do block commenting, if comment begins with slash-star-newline.

Add RCS indentifiers.

branches: 1.1.1;
added, from net/2 (patch 124).