Backport tiff from trunk to fix a few CVE's#521

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stevenwilliamson wants to merge 1 commit intoTritonDataCenter:joyent/release/2015Q4from stevenwilliamson:backport_tiff_20154

+195-29

Commits on Oct 23, 2017

Backport from trunk to fix a few CVE's
stevenwilliamson
committed