Update ImageMagick7 to 7.0.8.14 [1]
* Add option for ISO/IEC 23008-12:2017 HEIF suport [1]
* Add option for RAW support (from IM6).
* Convert a number of options to optionhelpers (sync from IM6).
* Add comment to the patch-config_policy.xml file why it still needed.
PR: 230788 (based on) [1]
Submitted by: Sebastian Steinmetz <freebsd-2018@sebastiansteinmetz.ch>
Disable EPHEMERAL, HTTPS, MVG and MSL coders until a a new release can be
made what fixes the CVE issues with these coders.
Obtained from: ImageMagick support forum
Security: CVE-2016-3714