Note for those pulling in new ZFS feature flags

[Mark Felder]

On 2014-04-07 08:54, Chris Nehren wrote:
> Not too long ago I upgraded my FreeBSD workstation to 10-STABLE
> from 10-RELEASE in order to try newcons.  After I upgraded to
> 10-STABLE, I saw in `zpool status` that my pools could be
> upgraded to a new version of ZFS.  I did this, and then needed to
> reboot the machine for unrelated reasons.  When it came back up,
> it refused to boot because gptzfsboot couldn't import the pools.
> 
> I solved this by re-running `gpart bootcode` for the afflicted
> drives.  This was a bit trying, though, as my workstation is the
> only FreeBSD machine I have readily available.  So, for those
> upgrading their zpools, be careful and remember to fix the
> bootcode if you're using ZFS for the root filesystem.
> 
> I have also filed a PR to note that situations like these should
> be noted in UPDATING, kern/188328.  Hopefully this post saves
> someone else a few hours.

I also created this little handy script to more easily update my 
bootcode...

https://feld.me/freebsd/bootcode-update.sh