Merge branch 'security-open-redirect-internalredirect-12-2' into '12-2-stable'
Use the '\A' and '\z' regex anchors in `InternalRedirect` to mitigate an Open Redirect issue. See merge request gitlab/gitlabhq!3476
Use the '\A' and '\z' regex anchors in `InternalRedirect` to mitigate an Open Redirect issue. See merge request gitlab/gitlabhq!3476