[rtg] New rtgpoll replacement

[Jakob Borg]

Hi all,

I have written a replacement for rtgpoll that uses MySQL multiple-row
inserts. This has the advantage of reducing load on the database
server, especially in the presence of indexes and large numbers of
tables. It should be a drop in replacement, given that you use MySQL
and your config files look approximately the same as mine -- it hasn't
been tested on anything else. :)

"RTG Clustered Poller" is available at http://github.com/calmh/ClusteredPoller.

If you find a use for it, or find bugs and room for improvement, don't
hesitate to let me know. For bugs, the best is to use the issue
tracker at Github.

Best regards,
Jakob