Bug#870815: Upstream 1.9.3 release

[Michael Gratton]

Just FYI the new upstream 1.9.3 release fixes all known CVE in 
libytnef: https://github.com/Yeraze/ytnef/releases/tag/v1.9.3

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⊨ Michael Gratton, Percept Wrangler.
⚙ <http://mjog.vee.net/>