Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Various NFS-related bug fixes (mostly related to using variable_get()
instead of variable_cmp() to test boolean rc.conf variables).

Submitted by: hmp

debugMsg() should end with "\n".

Do not include <sys/syslimits.h> directly; it is not intended for general
consumption.

Introduce DEVICE_INIT, DEVICE_GET, and DEVICE_SHUTDOWN macros. As the
names suggest, they perform methods on Device's. In addition, they
check that the pointer passed to them is valid; if it isn't, they
pretend that the action failed. This fixes some crashes due to NULL
dereferences (e.g., PR 26509).

Approved by: jkh (some time ago)

In retrospect, msgNotify() should leave its contents on the screen
longer to give the user something to look at while things are happening.
Change it to do so and insert the appropriate screen saves elsewhere.

$Id$ -> $FreeBSD$

Collapse the "get" code substantially by combining common functions.
Also make mountpoint for each media type easier to change.
Also reshuffled some menus for easier usage.

Revert $FreeBSD$ to $Id$

OK, I've got two ideas to file in the "really seemed like a good idea
at the time, but on further reflection..." bucket with these changes.

1. Checking the media before frobbing the disks was a fine idea, and
I wish it could have worked, but that leads to a rather difficult
situation when you need to mount the media someplace and you're about
to:

a) Chroot away from your present root.
b) Newfs the root to be.

You're basically screwed since there's no place to stick the mount
point where it will be found following the newfs/chroot (and eliminating
the chroot in favor of just using the "root bias" feature would work
great for the distributions but not the pkg_add calls done by the
package installer).

2. Automatic timeout handling. I don't know why, but alarm() frequently
returns no residual even when the alarm didn't go off, which defies
the man page but hey, since when was that so unusual? Take out timeouts
but retain the code which temporarily replaces the SIGINT handler in
favor of a more media-specific handler. This way, at least, if it's hanging
you can at least whap it. I think the timeout code would have been losing
over *really slow* links anyway, so it's probably best that it go.

This should fix NFS, tape & CDROM installs again (serves me right for getting
complacent and using just the FTP installs in my testing).

Argh! Moving the media initialization to before the disk scribbling
section was a good thing, since it made it possible to detect media problems
*before* the installation started, but it also caused various things to
be mounted BEFORE the chroot() call, which definitely messes things up.

Fix this by detecting the pre-chroot() case and mounting into a subdir.

Fix a variety of problems with my timeout handling, make it more
configurable (you can now set the timeout interval), fix a crash-bug
when no network device was attached.

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

1. Correct bogon in cdromInit when running multi-user which took cdrom offline
if wrong version.
2. Make sure network device is initialized in ftpInit
3. Eliminate bogus size values in the menus. For now, we'll have to admit
that nobody's added it up yet. In the future, these menus should be
build dynamically anyway, not declared static.
4. Add more debugging to networking code to chase the mystery ppp device
problem.

Do a few things I've been threatening to do for a long time:

1. Don't use the MSDOSFS code for accessing FreeBSD distribution data.
Use Robert Nordier's stand-alone DOS I/O library for the purpose.
It this works as well as Robert says it does, it should drastically reduce
(or even eliminate) our "I can't install from my DOS partition!" calls.

2. As a result of the above, go to stdio file descriptors for all
media types.

3. Taking advantage of #2, start using libftpio for FTP transfers instead
of maintaining our own parallel version of the FTP transfer code.
Yay! I ripped something out for a change!

#1 Submitted-By: Robert Nordier <rnordier@iafrica.com>

Conditionalize some annoying debug statements, update the docs.

Whoops! Now that I'm decompressing docs into /tmp, it's important to
make sure that /tmp is there first! :-) While I'm at it, clean up the
somewhat inexplicably bogus Mkdir() function.

Bring this into sync.

I still have a _very very annoying_ display bug which occurs when a menu
item causes a submenu to be displayed - the screen repaints for the original
menu (which is restored upon return from the submenu) are off by about 4
characters. I've tried restoring the screen, the cursor position, you name
it - same deal. Grrrr! This commit is my first step in trying to get someone
else to help me look into this one since I'm just tearing my hair out at this
point!

1. Update all the copyrights to delete useless clauses 3 and 4.
2. Change more of the menu code over to new system.
3. Streamline label editor.

Miscellaneous cleanup before big round of menu restructuring (to use new
libdialog features).

Update the -current sources from the 2.1 branch.

Approved (in spirit) by: jkh

Merge RELENG_2_0_5 into HEAD

Remove trailing whitespace.

NFS installation was broken - try to fix it.

Sync up my work for the night. This should implement ALL possible
installation methods and provide a fairly robust set of menu options.
This should also fix a few more bugs on Poul-Henning's latest gripe
list.

Things were getting seriously hard to find. Do a quick reorg pass over
the code and split things into more logical groupings.