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needed (reparsing of NS file with current bindings).

Mostly I decided that I made a huge mistake in using the exptidx as the
main cross index. I started to change that, which took a bunch of time.
Still more tables to fix up, but I think all of this code is gonna need
a major reorg once I am no longer under the gun to get it done.

an alternate "filename" for the dhcpd.conf file.  "Inner plabs" are likely
to need this (to boot pxelinux for emulating the plab boot CD).

dhcpd_makeconf picks up the DB field and sets the filename field accordingly.

nfree will invoke dhcpd_makeconf if any node being freed has a non-NULL
pxe_boot_path value, in order to reset it.

you can turn it on in your devel tree by setting the $EXPOSETEMPLATES
variable in www/defs.php3.in to 1. BE SURE NOT TO CHECK THAT CHANGE IN!

Changed format of email sent to user on errors.  The error will now
appear instead of the generic message when I am confident it is
accurate.  The subject line will also change to reflect the cause of
an error.

Avoid sending mail to testbed-ops during failed swap related evenets
in some cases.  It will instead be sent to a new mailing list
testbed-errors.

Added a new row in the experiment info table "Last Error:" which
states the cause of the error, and links to a new page displaying the
error.

Made some assign/assign_wrapper errors more informative.

The error (as determined by tblog) is now stored in the database in a
more structured fashion.  This inlcudes adding a column for the session
(in the log table) to testbed_stats to link eash swap event with the
logs and possible the error.

Other changes to the database, see sql/database-migrate.txt

to commit it.

usage of the batch daemon on swapin.

command line to use.  The old builtin defaults of '/kernel.delay' and
'/kernel.jail' are still used if nothing is found in the table.

of experiments that share an archive.

archived to long term storage.

First cut at a daemon that does regular checkups of the testbed
hardware/software.

	* configure, configure.in: Add tbsetup/checkup directory.

	* db/audit.in: Add a listing of stuck checkups.

	* install/boss-install.in: Add 'elabckup' user.

	* rc.d/3.testbed.sh.in: Startup the checkup_daemon.

	* sql/database-create.sql, sql/database-migrate.txt: Add the
	checkups tables.

	* tbsetup/GNUmakefile.in: Descend into the checkup directory.

	* tbsetup/checkup: The checkup daemon, man page, and
	  associated scripts.

	* tbsetup/ptopgen.in: Add a feature with a value of 0.9 to
	  prereserved nodes to keep them from being allocated unless
	  they're really wanted.

	* utils/firstuser.in: Add some other options so the script can be
	  used to create other pseudo users.

Updates to to Error Logging API Code.

You should start seeing much better error messages coming from my
system.  Errors coming from parse.proxy and assign (the two most
frequent sources of errors) should now be concise and to the point.
Errors coming from libosload/libreboot (the next most frequent source
of errors) should now also be much better, but not perfect.  Getting
perfect errors will likely a rework of how errors are handled in
libosload/libreboot, just adding tberror/tbwarn/tbnotice calls is not
enough.  I can do this at a latter date if necessary.

A few minor database changes.

Some changes to the API.  A few bug fixes. Lots of tberror/tbwarn/tbnotice
added to scripts.

Since assign is a C program, and at this time my API is perl only, I wrote a
second wrapper around assign, assign_wrapper2.  When assign fails errors are
now parsed in assign_wrapper2, sent to stderr and logged.  This means that
RunAssign() just returns when assign fails rather than echoing some of
assign.log output and then quiting.  The output to the activity log remains
unchanged.

Since "parse.proxy" is run from ops I couldn't use my API in it, even though
it is a perl program.  Instead I parse the errors coming form it in
parse-ns.

would be no big deal, except that we want to retain user_stats for
deleted users, and rather then a deleted_user_stats table, I want to
retain stats for deleted users in the user_stats table, since that
is a more natural place for them.

The main problem is that we use the login (uid) as the cross table
reference slot all over the DB, which is fundamentally incorrect, if
we want to be able reuse uids and still know what historical data
refers to.

So, I have taken a few baby steps towards weaning us off the uid, and
towards permanently unique key for users, using the unix_uid integer
for now, but probably something slightly different later.

The user_stats is now indexed on this new key (called uid_idx in the
users_stats table) instead of the plain uid.

The unix_uid slot in the users table is no longer an auto_increment
field, but instead uses the emulab_indicies table for the next
available index.

experiment, still likely to change.

change, and for now is only active at Utah.

the emulab-ops project only, so that we can more easily take nodes out
of the general pool, but still be able to use them.  This slot
actually takes a pid, so we could potentially use it more generally
for reserving nodes to particular projects, but I am not sure that is
the best approach yet.

lossrate and rlossrate from virt_lans table. The lack of digits adds
too much roundoff error, which causes linktest to falsely report
errors when plr is low.

Added plab_mapping table to the DB to help track plab node identity.

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.

so that different types can use different MFSes as necessary.  This
ultimately replaces the quadruple-X libos hack which I removed quite some
time ago.

Add serial and service_tag columns to the database for tracking machines.

	'boss' -> 'boss+router'
	'ops'  -> 'ops+fs'
	'fs'      (new role)
	'router'  (new role)

These are in preparation for allowing configurations with split ops and fs
nodes (and sometime down the road, split boss and router nodes).

This checkin is just the DB state changes along with the scripts that look
at that state.  The Big One, which actually sets up separate nodes
automatically, is undergoing more testing but will be Coming Soon.

defined for everyone. Admins can use this, for example, to make
type aliases.