[PATCH 0/3] a small branch API clean-up

This started as a little clean-up for a NEEDSWORK comment in
branch.h, but it ended up adding a rather useful safety feature.

Junio C Hamano (3):
  branch: streamline "attr_only" handling in validate_new_branchname()
  branch: split validate_new_branchname() into two
  branch: forbid refs/heads/HEAD

 branch.c                | 44 ++++++++++++++++++++++++++++++--------------
 branch.h                | 27 ++++++++++++---------------
 builtin/branch.c        |  8 ++++----
 builtin/checkout.c      | 10 +++++-----
 sha1_name.c             |  2 +-
 t/t1430-bad-ref-name.sh |  8 ++++++++
 6 files changed, 60 insertions(+), 39 deletions(-)

-- 
2.15.0-rc1-158-gbd035ae683