Limit metric length going into ganglia #100
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Add an option to limit metric name length for things destined for ganglia. This is to work around some xml parsing issues there.
(and add a .gitignore)
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Ganglia (at least the version we run) gets pretty unhappy with long metric names. I've attempted a fairly minimal patch to add an option on filtering those out. I've aimed for minimal, and matching local style.
Along the way, I also needed to do some kinda ugly hacking around how imports work. I don't think it's ideal, but it seems to work.