Merge branch 'feature-flags'
Feature flags support for ZFS ported from Illumos. Only minimal
compatibility changes were made where required to accomidate Linux.
For a detailed description of feature flags see original proposal
on zfs-discuss. They are conceptually very similar to Linux's
ext[234] style of feature flags.
http://lists.freebsd.org/pipermail/freebsd-fs/2011-May/011568.html
NOTE: This branch updates the default pool version for new pools
from 28 to 5000. Version 28 pools may still be created for
compatibility with Solaris by using the '-o version=28' option.
$ zpool create -o version=28 ...
Existing pools must be manually upgraded using 'zpool upgrade'.
$ zpool upgrade ...
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #778