FreeBSD_HEAD_i386 - Build #1094 - Fixed

[jenkins-admin at FreeBSD.org]

FreeBSD_HEAD_i386 - Build #1094 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/1094/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/1094/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/1094/console

Change summaries:

287707 by mav:
CTL documentation update, mostly for HA.

287706 by delphij:
MFV r287699: 6214 zpools going south

In r286570 (MFV of r277426) an unprotected write to b_flags to
set the compression mode was introduced.  This would open a race
window where data is partially decompressed, modified, checksummed
and written to the pool, resulting in pool corruption due to the
partial decompression.

Prevent this by reintroducing b_compress

illumos/illumos-gate at d4cd038c92c36fd0ae35945831a8fc2975b5272c

Illumos issues:

    6214 zpools going south
    https://www.illumos.org/issues/6214

287705 by delphij:
Fix build (r287703).  Lesson learned: no matter how a change looks like an
innocent one, always do a build test first.

Pointy hat to:	delphij