Modernize more except clauses
Put run.ini in outdir instead of top-level workdir

This allows us to easily save a copy of the run.ini when archiving,
which will make debugging easier in the future.
Change archive directory name

Normally we'd have been creating timestamped directories for any
netconfig/os pair that finished after the first netconfig/os pair to
finish for a particular srid. Now, the directories are named
srid_netconfig_os, so only re-runs of the whole 3-tuple will result in a
timestamped directory. This is what we want, really.