This change attempts to make the stats gathering code more reliable by
not relying on the testbed_stats records to reconstruct usage
statistics.  The main source of errors and total confusion in the
current stats code is that testbed_stats includes all the errors and
transitions, from which I have to reconstruct what happened in order
to determine usage by a project or user.

The new stats code still generates the testbed_stats code, but actual
usage is recorded as it happens, in the experiment_resources table, as
swapins, swapouts, and swapmods occur. Its also much faster to compute
the data for the tables in the web interface, not having to scan a
zillion testbed_stats records in php.

There is a time consuming update to the records that takes place with
a lot of tables locked.

just plain /users -- for that, need USERSROOT_DIR instead.

That is, they are not in the nodes table but they are in the outlets table.
Useful during initial bring up.

Added a lower limit on the bandwidth measurements frequency

Updates for better handling of getstatus failures
1 - libwanetmon.pm/sendcmd: tcp timeout is changed from 1 sec to 3 sec
2 - Now we remove a node from measurement only if it fails two consecutive
    attempts (currently a getstatus probe happens every half an hour).
    Though if there exists multiple nodes at a single site, it can
    switch over to other node after a single getstatus failure.

installs possible).

'iperfd-FC4'.

jailed vnodes if it exists.  Used to size their virtual disks.

Passes -f option to newnode.

more space, but this confuses sorttable, so avoid confusion (and an
undefined variable).

changed slightly, change parsing a bit).  The iperf bw
measurement src seems to have gone missing, so we're just not getting
these anymore.  They could come from flexlab if we ever care.

Adding lock file mechanism to detect already running instances of the script.

hadn't realized that)

Turn on $javascript_debug at the top of menu.php3, and then use warn()
statements in the code to have those debug statements turn up at the
bottom of the page. This is the most cross-browser implementation I could
find (which means it works on Safari, IE, and Firefox).

Basically, not going to work for Safari, and the fallback code did not
work either cause Safari does not implement onload for iframes, nor
does it do some other stuff for making frames visible. More kludges.

This broke IE of course, and hours later I figure that out.

Updating script to speed up the insertions by preparing statement in advance
and then executing in a loop. It still not as fast as I would like though.

removed some debug printing statements.

Updated libtbdb for handling multiple sql connections to different database.
It's backward compatible with the older interface.

Also added a new method named 'DBBinaryQuery' for inserting binary data into
the database.

Adding new script name "pelab_sql_dbpush" for syncing data between ops
and DP using direct sql connection to the DP.

cache latest statistics about planetlab nodes (a reduction of the
data in plab_nodehist).

  "$DBQUERY_MAXTRIES" is not exported by the libdb module
All I did was exactly what Template.pm does, but obviously I am a bozo
for not understanding something!