Oft-desired (by me anyway) hack to print out most recent log entry in
the hwdown experiment listing. Just a simple hack I though. Ye Gads! That was painful. On the plus side, I now know the different between all those SQL join types :-) Anyway, added a showlastlog variable in the SHOWNODES function. Currently, it only gets set if the pid/eid is emulab-ops/hwdown. Eventually it could be a parameter so it could be selected for any experiment.
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