FreeNAS Code

Refactor automatic replication/snapshotting process:

- Decouple replication from snapshotting. This makes it possible for the
snapshotter to take snapshots while replication is in progress.
- Implement a set of locking mechanism to prevent parallel issue.
- Protect "held" snapshots from being destroyed, this includes the last
snapshot we have replicated for an incremental transfer, the in-progress
snapshots.
- Try harder to recover from failed transfers.

Update also the pt_BR.po file.

Update translation de.po file.

Instead of setting a hard-coded mountpoint, use altroot to enforce the
desired hierarchy.

Add a simple handler to ix-zfs so it handles migration on boot.

While I'm there also slightly restruct the code to reduce duplication.

Upgrade port php to 5.3.6. (Also thanks to Kevin Fowler Kfowler@... for his work on this port upgrade)

fix migration in case of noxexistent user

minor graph modifications.

set data migration dependency of storage 8 in services 29

Switch to perl 5.12

update ports tree