Requesting __FreeBSD_version bump for ZFSv28 MFC

[Boris Kochergin]

Hi. A while ago I had requested that __FreeBSD_version be bumped for 
future ZFS userland API changes 
(http://lists.freebsd.org/pipermail/freebsd-fs/2010-May/008459.html), 
since I guess I am the only other user of the userland API aside from 
the official tools. There was at least one change in the transition from 
15 to 28 that broke my code, and __FreeBSD_version doesn't look like it 
was bumped for the v28 import into -CURRENT. Can it please be bumped for 
the MFC to 8?

Thank you.

-Boris