sort always with LANG=C

somehowe puppet leaks then LANG into execs, which can give different
ordering depending with which LANG puppet is executed. Which is likely
different between a logged in admin and cron
Merge pull request #51 from duritong/lang_sort

sort always with LANG=C
Update temporary files even when running in 'noop' mode
Suppress log messages when updating temporary files
Properly execute 'concatfragments.sh' even when '$concatdir' is mounted with 'noexec' flag