Reduce draft release notes to 1.7.12
Reduce draft release notes to 1.7.12

Many "fixes since 1.7.11" items are now in the maintenance track

Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git