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Everything else works the same; stick the required entries in the
interfaces tables and the outlets_remoteauth table.

Oh, I ripped out the existing parallelizzation code and replaced it
with the library code emutil::ParRun(), which is slowly making its way
across the system, replacing all the one-off cases of using fork to
parallelize things. Very handy.

nodes.  Now we shouldn't hang the reload daemon anymore if `power'
hangs.  Also, iLO power cycles are always parallelized because they
have the potential to take so long.

the db, to slogin to the node's ilo interface (which has to be specified
in the interfaces table), then uses a simple expect-like sequence over a
pty to control power.