Changes:
- Support aspect ratio geometry, e.g. -crop 3:2.
- Add support for reading the HEIC image format.
- Fix IM build when HEIC is enabled.
- Fixed numerous memory leaks, credit to OSS Fuzz.

It's worth to note that upstream sadly removes tarballs of old releases,
so for instance ImageMagick-6.9.9-33.tar.xz is no longer available.

https://www.imagemagick.org/script/index.php:

> It is distributed under the Apache 2.0 license.

The LICENSE file contains a preface, but that just explains the
following text of Apache-2.0 license in simple terms.

J0WI authored Apr 02, 2019 and Natanael Copa committed Apr 03, 2019

fixes #10189

fixes a regression introduced by the security update 1.8.1.

upstream issue: https://github.com/libssh2/libssh2/issues/336
downstream issue: https://github.com/gliderlabs/docker-alpine/issues/507

- CVE-2019-3855
- CVE-2019-3856
- CVE-2019-3857
- CVE-2019-3858
- CVE-2019-3859
- CVE-2019-3860
- CVE-2019-3861
- CVE-2019-3862
- CVE-2019-3863

Fixes #10131

- CVE-2019-3871

        - CVE-2018-5785

        this commit fixes #10096

exclude /dev/* from minirootfs.

https://github.com/gliderlabs/docker-alpine/issues/356
(cherry picked from commit 2f07f9eb)

Fixes #9755

CVE-2018-16890, CVE-2019-3822, CVE-2019-3823

Fixes #9993

we dont need --extra-repository anymore but keep it for backwards
compatibility

CVE-2018-20685, CVE-2019-6109, CVE-2019-6111

Rebased HPN patch, included upstream patch due regression bug due to CVE-2019-6109 fix

Fixes #9999

Fixes #10006