avg ff3a1d7da2 zfs_mount: restore a bit of ifdef-out illumos code ...

And correctly mark the end of the replacement FreeBSD code.

MFC after:	1 week

2018-01-09 13:43:04 +00:00

..

common

MFV r325605: 8713 Buffer overflow in dsl_dataset_name()

2017-11-09 18:12:21 +00:00

uts

zfs_mount: restore a bit of ifdef-out illumos code

2018-01-09 13:43:04 +00:00

OPENSOLARIS.LICENSE

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