Security Update to 11.9.7.
Please see here for more details:
https://about.gitlab.com/2019/04/10/critical-security-release-gitlab-11-dot-9-dot-7-released/

It should be merged to 2019Q2 together with:
www/gitlab-ce
498058
devel/gitaly
498360

MFH: 2019Q2
Security: a0602fa0-5c1c-11e9-abd6-001b217b3468