MFC r267667:
use .Mt to mark up email addresses consistently (part1)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

MFC r306714:
Document where chio(1) originated from & which version of FreeBSD first
included it.

PR: 211776
Approved by: bcr (mentor)
Differential Revision: https://reviews.freebsd.org/D8104

MFC r306584:
Move the description of CHANGER variable to ENVIRONMENT section rather than
in the DESCRIPTION section.
From OpenBSD src/bin/chio/chio.1 r1.23

PR: 212158
Approved by: bjk
Obtained from: OpenBSD
Differential Revision: https://reviews.freebsd.org/D8117

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Add the new standard EXIT STATUS section where appropriate.
Sort standard sections in the (documented) preferred order.

Removed harmful empty lines that crept in during the copyright
header update.

/*- or .\"- or #- to begin license clauses.

Mechanically kill hard sentence breaks.

The .Nm utility

Correct typos, mostly s/ a / an / where appropriate. Some whitespace cleanup,
especially in troff files.

mdoc(7) police: join split punctuation to macro calls.

Remove whitespace at EOL.

mdoc(7) police: remove extraneous .Pp before and/or after .Sh.

mdoc(7) police: simplify construct.

(null commit)

Previous commit has wrong log message. The correct one is:

mdoc(7) police: do not split author names in the AUTHORS section.

log

more removal of trailing periods from SEE ALSO.

Avoid use of direct troff requests in mdoc(7) manual pages.

Use .Cm macro where appropriate.

Fix horrendous abuse of the Nm and Pa mdoc macros, and remove troff
bold markers \fB and \fR.

Add two new features to chio(1):
- The ability to specify elements by volume tag instead of their actual
physical location. e.g., instead of:
chio move slot 3 slot 4
you would now use:
chio move voltag FOO slot 4

- The ability to return an element to its previous location, as specified
by the source element. e.g., instead of:
chio move drive 0 slot 4
you would now use:
chio return drive 0
or
chio return voltag FOO

These features will obviously only work with changers that support volume
tags and/or source element IDs. chio(1) should fail gracefully if the user
attempts to use these new features and the source element ID or volume tag
are not found.

PR: bin/21178
Submitted by: "C. Stephen Gunn" <csg@waterspout.com>
Reviewed by: ken

$Id$ -> $FreeBSD$

Changes from OpenBSD:
* Better usage() - correct syntax, display available commands
instead of examples
* Accept command abbreviations
* sprintf -> snprintf (for paranoia)
* manpage capitalisation tweak

Obtained from: OpenBSD

superceded -> superseded, which after some debate on #FreeBSD is in
fact the proper spelling.

PR: docs/8697
Submitted by: Sascha Blank <blank@fox.uni-trier.de>

Updated the ch(4) driver and chio(1) command to include volume
tag support. These changes have been tested with a Breeze Hill
Q47 DLT and a DEC DLT2500 media changer. The latter has no
volume tag support.

The chio(1) command was updated to include various flags to the
status subcommand. These flags can be used to select additional
information to be displayed (like volume tags).

A new chio(1) subcommand named 'voltag' has been added which allows
for changes to volume tags inside the media changer controller.
This could not be tested as the Q47 does not provide the functio-
nality.

Submitted by: Hans Huebner

Fix a bunch of spelling errors.

PR: 6856
Submitted by: Josh Gilliam <josh@quick.net>

Correct use of .Nm and other cosmetics. Add rcsid. Remove unused #inc.

.Sh AUTHOR -> .Sh AUTHORS
Use .An/.Aq

spelling corrections.

PR: docs/4450
Submitted by: josh@quick.net

Add X-reference to ch(4).

This commit was generated by cvs2svn to compensate for changes in r23449,
which included commits to RCS files with non-trunk default branches.

Import Jason Thorpe's contribution for an updated SCSI media changer
device (now, finally!).