Remove $FreeBSD$: one-line nroff pattern

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

signal: Remove gsignal references from manuals

Reported by: Mina Galić, mhorne
Reviewed by: Mina Galić, mhorne
Differential Revision: https://reviews.freebsd.org/D41020
MFC after: 1 week

Catch up with HEAD (r280229-r284686).

MFH: r282615-r283655

Sponsored by: The FreeBSD Foundation

Merge sync of head

Fixup to the kern_psignal manpage

r283105 misspelled kern_psignal as kernel_psignal in one occurrence, and
added trailing whitespace.

While here, change 'call' to the more standard 'function', and

Fixup to the kern_psignal manpage

r283105 misspelled kern_psignal as kernel_psignal in one occurrence, and
added trailing whitespace.

While here, change 'call' to the more standard 'function', and say why
the name was changed (taken from the commit message for r225617).

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Only several years late, catch the psignal man page up to the
fact that psignal has been renamed to kern_psignal since 9.0.

MFC after: 1 week

IFC @230489 (pending review).

IFC @ r226824

Mention tdsignal(9).

MFC after: 1 week

Update to current version of head.

The NetBSD Foundation has granted permission to remove clause 3 and 4 from
their software.

Obtained from: NetBSD

Cross-reference signal(9).

mdoc(7) police: Use the new .In macro for #include statements.

mdoc(7) police:

Avoid using parenthesis enclosure macros (.Pq and .Po/.Pc) with plain text.
Not only this slows down the mdoc(7) processing significantly, but it also
has an undesired (in this case)

mdoc(7) police:

Avoid using parenthesis enclosure macros (.Pq and .Po/.Pc) with plain text.
Not only this slows down the mdoc(7) processing significantly, but it also
has an undesired (in this case) effect of disabling hyphenation within the
entire enclosed block.

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Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.

Place #include's and $NetBSD$ tag to appropriate places.

$Id$ -> $FreeBSD$

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

.\" $Id$
.\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by: bde

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Cleaned up synopsis:
- don't quote function names, since quoting them is unnecessary and
unusual and confuses my synopsis checker.
- include <sys/types.h> instead of <sys/param.h>. It is normal to

Cleaned up synopsis:
- don't quote function names, since quoting them is unnecessary and
unusual and confuses my synopsis checker.
- include <sys/types.h> instead of <sys/param.h>. It is normal to
(have to) include <sys/param.h> instead of <sys/types.h>, but it
is more useful for man pages to document minimal prerequisites.

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Fixed missing #includes in synopsis.

Add psignal(9).

Obtained from: NetBSD

The NetBSD Foundation has granted permission to remove clause 3 and 4 from
their software.

Obtained from: NetBSD

Cross-reference signal(9).

mdoc(7) police: Use the new .In macro for #include statements.