3705 stack overflow due to zfs lz4 compression
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Christopher Siden <christopher.siden@delphix.com>
	[illumos-gate merge]

commit d8fa96c3021236b21f47b84036cbe4f5d4854a06
    3705 stack overflow due to zfs lz4 compression
Merge branch 'master' of git://github.com/joyent/illumos-joyent into smartos/ec