[Xmldatadumps-l] dump bumps in the road

[Ariel T. Glenn]

As people prepare for the "het deployment" of mw 1.18 you are going to
see some interruptions of the dumps while I get these hosts ready for
the switch.  As a side effect of one of the configuration changes, the
host running the "large-ish" wikis is temporarily not running any jobs.
I should be starting those jobs again on Moday.  The four "small wiki"
processes should be ok.

When we get around to the actual deployment, I will likely stop all jobs
til deployment is complete, as I cannot begin to guess what the output
would look like if the codebase were switched out underneath the dumpers
in the middle of a run.  

Ariel