New node_attributes facility and table.

Auxiliary node attributes, such as service tag #, BIOS version, etc., are
should now be placed into the node_attributes table.  This can be accomplished
by either using the node_attributes command line tool, or by using the
modnodeattributes_form.php3 form (not linked in anywhere yet, but will be
in a moment).  Attribute names and values are checked for sanity using
table_regex entries.  Also note that I started with the nodecontrol stuff
as a template.

The command line tool and web form (which simply calls the command line tool
to actually do the modifications) can add, delete, and/or remove attributes.

Finally, note that the bios_version column has been moved from the nodes
table to the node_attributes table.  The Node Information page will show
the list of current attributes at the bottom of the info table.

Move them to defs-default.

Allow for per-user defs files to use . defs-default in them. I do this
by temporarly changing the path when evaluating the defs file, adding
the directory where the defs file lives. So, you can do this in your
personal defs file, whic saves on a lot of typing!

	. defs-default
	TBOPSEMAIL=stoller@flux.utah.edu
	TBLOGSEMAIL=stoller@flux.utah.edu
	blah
	blah
	blah

I also changed all of the *local* defs file to use the above format.

the defs file when PLABSUPPORT=1 or an error is raised by configure.  Whenever
the official rootball name/version needs do be bumped, do so in defs-default.
You may track the defs-default rootball name in your defs file, or use your
own divergent name for testing.

A couple of things:

1) Added PLAB_SLICEPREFIX so that we can separately instantiate plab slices
from mini, or elsewhere.  On the mainbed, its set to "emulab".  On mini, its
set to "emulab_mini".  The "emulab" part has to exist first so that the new
plab node manager doesn't nuke our dslice slivers.

2) Fixed up Plab.getFree() so that it doesn't try to add the same IP twice
to the DB if a new one is found, and listed more than once.

tree gets installed. I've set it for our default defs, and for all
the *-emulab devel defs files.

configure.in.

cron daily, on the fs node (ops) as root. Uses lots of configure variables
so that it does the right thing in any installation, without any
customization.

One possible caveat regarding quotas: If FS_NODE != USERNODE, they don't
have a login on the fs machine. So checking their quota won't work unless
the rpc.rquotad(8) daemon is running on FS_NODE, which we currently don't
do.

In order to do this right, I had to add a new configure var,
FS_WITH_QUOTAS, that has a space separated list of file systems that have
quotas enabled. (Ie the default is 'FS_WITH_QUOTAS="/q /users"'.) It
doesn't have any default, since I couldn't come up with a reasonable one.
All the defs files have been updated appropriately to define this new
variable.

Before:
The main defs file (ie for configure) had an entry for WWWDEFS that
pointed to a <@WWWDEFS@>-defs.php3 file in the www/ directory. The www
defs file loaded some values about web pages, URLs, and some web
configuration parameters.

Problem:
Anything that was only in the www defs file was not accessible in the rest
of the universe (ie perl, C, and any other non-web-page scripts). For
instance, you couldn't have a perl script send an email to a user with a
link to the web site.

Solution:
Nuke all the www-defs files, move any important values into the main
configure, and change the web defs infrastructure to respect that. This
also meant adding about 3 lines each to all of the configure defs files.
(There really are about 10 new values you can change in your defs file,
but in almost all cases, the default values are the right thing.)

Upgrading:
External sites will need to move a few variables from their www-defs file
into their configure defs file. The example file should make it pretty
obvious. They may also want to customize some of the other vars that are
mentioned in configure.in and www/defs.php3.in .

picks it up from the main defs file via configure.

Fixed up everybody's defs and www defs files to match the new way of
doing things.

Add email aliases for testbed-stated and testbed-testsuite, and update all the defs files to use the same (or similar) addr for those lists as for testbed-logs. Make stated use the new alias too.

Also included here is my defs.

it is converted into a proper config.h file in the object directory.
Look for AC_DEFINE_UNQUOTED in configure.in. This removes some of the
headache of defining variables for C code in the makefiles. Be sure
sure to add -I.. to CFLAGS and include "config.h" in your source code.

fileserver - ie. fs.emulab.net . tmcd and exports_setup now use this
variable rather than a hard-coded node name.

Some minor cleanup/commenting as well.

Also, a few more access checks. Only admins are able to run 'inuse' (to prevent
users from seeing each other's experiments.) You are also only allowed to run
tbreport for experiments in projects that you are trusted by.

using the libdb library. They have also been cleaned up somewhat, with more
comments added, etc.

I've merged nodeip and mac2if, which had very similar functions. The merged
version goes under the name nodeip.

Lastly, I've added some access checks to db2ns and node_status, to make sure
they're only called by the right people.

things, although this solution is not hugely better ...

	BOSSNODE=boss.emulab.net
	USERNODE=users.emulab.net
	OURDOMAIN=emulab.net