[PATCH 0/6] minor pack-name cleanups

This started by cleaning up some unchecked snprintf() calls, but grew a few related cleanups nearby. I doubt the snprintf truncation affected anybody in practice, but I think the result is nicer to read.

  [1/6]: index-pack: factor out pack/idx finalization
  [2/6]: move odb_* declarations out of git-compat-util.h
  [3/6]: sha1_file.c: make pack-name helper globally accessible
  [4/6]: index-pack: drop fixed-size buffer for pack filenames
  [5/6]: fast-import: replace fixed buffer with odb_pack_name
  [6/6]: odb_pack_keep(): stop generating keepfile name

 builtin/index-pack.c | 48 +++++++++++++++++++++---------------------------
 cache.h              | 21 +++++++++++++++++++++
 environment.c        |  6 ++----
 fast-import.c        | 26 +++++++++++++-------------
 git-compat-util.h    |  2 --
 sha1_file.c          | 17 ++++++-----------
 6 files changed, 63 insertions(+), 57 deletions(-)

-Peff