merge b_llpio into b_llpmd:

merge b_llpio into b_llpmd:

- bug 1639: write/truncate lock inversion
- bug 1763: fix timestamps from jumping to "now"
- bug 1648: extra journal assertions
- bug 1771: add an extra multiunlink test
- bug 1776: fix read_record/write_record API
- bug 1772: fix leak of offset_extent, possible incorrect i_size later
- bug 1541: fix lasserts in mis-matched transnos during open-unlink testing
- don't mark a file as an orphan unless this is the last link
- avoid committing NULL handle in force close
- local.sh is now a one-stripe LOV configuration