OS-2556 make existing zfs filesystem limit feature obsolete
OS-2526 sdev_access() race leads to panic
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
OS-2557 file rename event fires before the rename happens
OS-2533 spawn fails occasionally with EAGAIN
Merge branch 'master' of git://github.com/joyent/illumos-joyent into smartos/ec