c031fd115a
GitLab unlike GitHub keeps the footer from git-format-patch(1) which frequently changes on Git version upgrades. So, switch to git-diff(1) which lacks header/footer. Approved by: x11 (zeising via Gitter) MFH: 2020Q2 (avoid bustage over time due to upstream infra upgrades) Differential Revision: https://reviews.freebsd.org/D24810