Fix typo in config for MailQ monitor.

Catch a lot of old URL's and update them. Also remove a couple of old files
that aren't used.

Tidy up of the client interface code - more commonly known as the
"right hand side of the server". Right since the start the filter
side of the server has been nice and tree like - every Filter sent
data to another Filter. At the top of the tree there was a "special"
Filter known as the RootFilter, which to the other Filters just
looked like a normal Filter. This was nice, and simple, and expandable.

The Client Interface on the other hand was messy. The root filter
had some hacky wrapper threads which pulled from a queue and pushed
to the relevant client interfaces (one for real time stuff, and the
other for databases). There was no simple room for expandability -
it was all hardwired to do just what was needed at the time.

This commit changes that. A Client Interface now connects to another
Client Interface, with a special one being found in the RootFilter
(yes, maybe that needs a name change now :-). So we can chain client
interfaces, and move other bits and bobs around in the server - for
example, alerting no longer needs to be connected to the Client
Interface, it can connect straight to the RootFilter (or, wherever
the config tells it ;).

Hopefully this sanitizes the underlying layout of the server a bit.

As a final note, I dropped the DBInterface. This used to insert
data in to a MySQL database. We've long since stopped using that,
and it's fallen behind and is way out of date. For now, it's gone
in to the attic.

Changed queue monitoring period from 15 seconds to 5 minutes. Makes sense
to do this now we've dramatically reduced the flow of packets.

Fairly major commit. This will break the current version of ihost, but this
had to be done really to give Pete something to test the new ihost against.

The main change here is removal of the TCP Heartbeat functionality from the
filter. This meant the following features stopped working :-
  - Heartbeat testing
  - Configuration checking
  - Service checks

The heartbeat testing, specifically the monitor, now looks at the presence
of UDP packets instead. Before it just looked for the presence of a TCP
heartbeat packet, so the change their is fairly negligible. Of course this
means heartbeat testing now relies on the UDP working... but I don't see
this as a problem.

Configuration checking has been repositioned in to the filtermanager. This
is a backwards compatible change - the filtermanager should still perform
as it should for older hosts. But now there's an extra command to check the
configuration is up-to-date, with a similar format to the old TCP protocol
in the filter. (although we may optimise this soon)

The service checks are broken. This isn't a major issue for us as they were
pretty useless in the first place. The concept is good, but the checks are
just far too primitive. I expect at some point I'll work on a seperate
component that just monitors services, which will replace this function.

Further changes in the server include removal of the key checking code,
as this relied on a bolt on to the TCP heartbeat protocol to ship the
key. This got more akward than originally planned, so I'm happy to drop the
idea. In the long term we hope to replace this with a public key systems
for signing and even encryption.

Finally, general tidy up to remove other bits of code that check for
TCP heartbeat packets when they don't need to any more.

By default we don't activate the DBInterface. I'll try and craft this in
to a better "default" config at some point.

Added support for taking "cache" memory as being free, for the purpose of
generating alerts. This is useful on platforms such as FreeBSD and linux
where the OS holds on to free'd memory as cache.

Initial work on host authentication for the server. Until I can get ihost
doing it's side of the host authentication I can't really test any further.
It seems to work, as in it filters data which isn't authenticated when told
to do so in the config :)

Added Access Control Lists to all parts of the server that listen for
either TCP or UDP connections.

New options added to the configuration to permit activiation of individual
input feeds in the Filter. You could, for example, disable the CORBA feed
on all filters that have no children.

Merged in changes from the SERVER_PIRCBOT branch. The IRC__Alerter now uses
pircbot (www.jibble.org/pircbot.php) for it's IRC connectivity. All the
features from the old version have been moved across to the new one, with a
few minor changes.

Typo fixed in the configuration for the logging alerter. The message setting
was not being picked up, which resulted in the default being used. The default
was not overly useful :)

Major change in the java package naming. This has been held off for some time
now, but it really needed doing. The future packaging of all i-scream products
will be;

uk.org.iscream.<product>.<subpart>.*

In the case of the central monitoring system server this will be;

uk.org.iscream.cms.server.*

The whole server has been changed to follow this structure, and tested to a
smallish extent. Further changes in other parts of the CMS will follow.

The alerting level for the WebFeeder has been changed to have the format of the
other alerters (as it now extends the skeleton class for alerters). It therefore
requires a configuration value with a common format.

Added UserCount monitor to the list.

Changed the Queue thresholds to something more realistic.

Tidied up the Monitor's section. Alert timeouts are stored as defaults, which
can be overridden. This saves repeating the same values.
Also neatened the layout and comments. More detailed explanation could be given
in the user documentation.

Need to turn Process and Load Monitors on.

Added Webfeeder alert level.

new config

Halfed the OK/FINAL timeout periods. It's a bit hard to test with such long
intervals to wait :)

Added new values for the WebFeeder.

Added the Services Monitor to the config.

Now has the config for the new Disk monitor

Got the filename wrong by mistake.

Configuration start for WebFeeder.

Opps, I didn't put FTP in !

Added a comment to clarify the situation with heartbeat thresholds.

Has some comments for alerters, and new FINAL config

Changed the default filter to something more helpful.

Added IRC__Alerter's version command.

Changes to fit with the new IRC Alerter.

Setup the host grouping.

Some configuration files that we've be running with.

Lets run an SMTP check :)

added HTTP request

More reasonable update times that we'll use for testing.

Better to run the TypeChecker first.

Brought inline with the default.properties.

file system.conf was initially added on branch SERVER_PACKAGEBUILD.