MFH: r517408

Fix CVE-2017-8372, CVE-2017-8373 and CVE-2017-8374

• Bump PORTREVISION for package change

Differential Revision: https://reviews.freebsd.org/D22300
Submitted by: Daniel Engberg <daniel.engberg.lists@pyret.net>
Obtained from: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=508133#15
Security: b48e7b14-052a-11ea-a1de-53b029d2b061

Approved by: ports-secteam (delphij, miwi)