RelNotes: spelling & grammar tweaks

Signed-off-by: Marc Branchaud <marcnarc@xiplink.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Git 2.2

Signed-off-by: Junio C Hamano <gitster@pobox.com>
refs: pass full flag to create_dir_entry

Right now we pass only an "incomplete" boolean, but we will
add more flags in future patches. Let's let callers just
pass the whole set of flags in.
refs: allow flags for intermediate refs
add REF_PACKED flag
horrible wip