MFH: r497777 r498215 r498433 r498620 r498778 r498828 r499416 r499701 r500618 r500761 r500838 r500939 r501059

devel/git-cinnabar: update to 0.5.1

Changes: https://github.com/glandium/git-cinnabar/compare/ddd4e3b...0.5.1
Approved by: ports-secteam (miwi)