Revert "Restore the sha2 versions from freebsd HEAD, they are newer than PEFS"

This reverts commit 1e1b41e5e719f368280a579aefadb249cfbb67f5.
Revert "Update PEFS to latest from GIT"

This reverts commit 54cb8a9947c022c6b8d9b31423596d1e73ff5725.