growfs: make exit codes more consistent

We have overused err(1), so it's hard to distinguish when an error is
very, very serious, and when it's just a user-error, or even harmless.

This patch changes the current behaviour to distinguish between the
following three:

1 for usage errors
2 for recoverable errors
3 or higher for unrecoverable errors

Reviewed by: jilles, pauamma_gundo.com, des
Differential Revision: https://reviews.freebsd.org/D27161

Remove $FreeBSD$: one-line nroff pattern

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

add Xr to the rc.d script...

Tone down the description for the growfs "-y" flag.

MFC after: 2 weeks

Update the example growfs(8) manual page to include information on how
to make the system "notice" the updated disk size.

(Relnotes, since I've forget to set it for "camcontrol reprobe", and
it's worth mentioning.)

MFC after: 1 month
Relnotes: yes
Sponsored by: The FreeBSD Foundation

Uniformly refer to a file system as "file system".

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Add example on how to use gpart before growfs. While here, reorder examples
so that the simplest one comes first.

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Document growfs(8) feature apparently nobody knows about.

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Use proper ordering in EXAMPLES section in growfs(8).

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

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

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

Somehow stable/10 branch contains correct version, but head doesn't.

Adjust introduction history.
Dump .Dd for this and previous changes.

Discussed with: trasz
MFC after: 3 days

Remove superfluous paragraph macro.

Make it possible to resize filesystems mounted read-write, using newly
introduced UFS write suspension mechanism.

Reviewed by: kib, mckusick
Sponsored by: FreeBSD Foundation

mdoc: remove redundant paragraph macro.

Improve growfs(8) in a few ways; unfortunately, it's somewhat hard to untangle
them and commit separately.

1. Rewrite the way growfs(8) finds the device and mount point. This makes
it possible to use e.g. "growfs /mnt"; it's also used to display more
helpful messages.

2. Be more user-friendly, using descriptive messages, like this:

OK to grow filesystem on /dev/md0, mounted on /mnt, from 9.8GB to 20GB? [Yes/No]"

3. Allow to specify the size (-s option) just like with mdconfig(8), i.e. with
postfixes ("mdconfig -s 10g").

4. Reload read-only filesystem after growing.

Reviewed by: kib, mckusick (earlier version)
Sponsored by: The FreeBSD Foundation

Revert the mechanical change from 'file system' to 'filesystem', committed
in r223429. As bde@ pointed out, it was mostly backwards.

Cosmetic fixes; mostly s/file system/filesystem/g and removing weird indent
from messages.

We now have multiple filesystems (UFS, ZFS, ...), so for tools that only
operate on one type of filesystem, mention this.
While here, capitalise the use of "UFS" in growfs.8 to match other uses of
the term in other man pages.

MFC after: 1 week

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

Sort sections.

Cross-reference ffsinfo(8).

Fix bogus "ffsinfo -c 0" example with "ffsinfo -g 0 -l 4".

PR: bin/61472
Submitted by: Alex Popa <razor@ldc.ro>
MFC after: 1 week

Remove another instance of 'disklabel' which eluded me last time.

Noticed by: Andre Guibert de Bruet <andy@siliconlandmark.com> (via -doc)

s/disklabel/bsdlabel

Submitted by: Andre Guibert de Bruet <andy@siliconlandmark.com> (via -doc)

Remove references to ffsinfo(8) for now. It was disconnected from
the build almost a year ago.

Uniformly refer to a file system as "file system".

Approved by: re

Typo fix that I brought in rev 1.16

Mention that fdisk(8) should be used to grow the containing slice
before growing partitions with growfs(8), if necessary.

PR: docs/42148
Submitted by: Chris S.J. Peron <maneo@bsdpro.com>

s/filesystem/file system/g as discussed on -developers

can not -> cannot.

The .Nm utility

more file system > filesystem

Typo fix: Usally -> Usually.

PR: docs/34918
Submitted by: Harry Newton <harry_newton@telinco.co.uk>

Minor grammar fixes.

mdoc(7) police: spelling, punctuation and markup nits.

fixing a bug in test mode (growfs -N)

Submitted by: Chris Boltwood <chris@hiendmedia.com>
Reviewed by: tomsoft
MFC after: 5 days

MFS: in HISTORY section, fix release number of first appearance

Remove whitespace at EOL.

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

Fix a logical bug introduced by changing the formatting.

Submitted by: ru
Reviewed by: chm

Mdoc(7)ify.

corrected spelling mistakes in comments
check a couple of mallocs
usage of errx
linebreaks of DBG_ macros,
correcting the usage of nroff macros

Submitted by: grog, charnier
Reviewed by: chm

added growfs(8) including ffsinfo(8) to the freebsd base system

Reviewed by: grog