src/pmlogger/pmlogger_rewrite.sh: tweaks for -N
src/pmlogger/pmlogger_rewrite.sh: tweaks for -N

If we're really doing "show-me" don't try too hard to check the
integrity of the archives (like the ones used on some QA tests).

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp