- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Add -c option to sesd to make it clear enclosure status after reading it
in case if it is not permanent and was fixed.

Rise priority of the informational messages from LOG_INFO to LOG_NOTICE,
same as used for OK status. Otherwise it looks strange when OK status is
reported, while informational is not.

MFprojects/zfsd:
Revamp the CAM enclosure services driver.
This updated driver uses an in-kernel daemon to track state changes and
publishes physical path location information\for disk elements into the
CAM device database.

Sponsored by: Spectra Logic Corporation
Sponsored by: iXsystems, Inc.
Submitted by: gibbs, will, mav

Cleanup code to make it WARNS=6 clean:

- ANSIfy prototypes;
- Add __unused for parameters that is not being currently used;
- Add a header for subrountines being called from other modules.

Reviewed by: mjacob

Update SES userland examples to something out of the toy stage.
Approved: jkh