[PATCH-master] tag: add --points-at list option

The following applies the "points-at" feature to master and includes unit tests
from Jeff King [off-list ref]

Tom Grennan (1):
  tag: add --points-at list option

 Documentation/git-tag.txt |    6 ++++-
 builtin/tag.c             |   50 ++++++++++++++++++++++++++++++++++++++++++++-
 t/t7004-tag.sh            |   39 +++++++++++++++++++++++++++++++++++
 3 files changed, 93 insertions(+), 2 deletions(-)

-- 
1.7.8