The sysfs infrastructure for reporting supported features and
properties is Linux specific. Disable it on FreeBSD until it can
be extended to be more portable.
Reviewed-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>
Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes#9684
0dcef9b966