Merge branch 'bp/untracked-cache-noflush'

Writing out the index file when the only thing that changed in it
is the untracked cache information is often wasteful, and this has
been optimized out.

* bp/untracked-cache-noflush:
  untracked cache: use git_env_bool() not getenv() for customization
  dir.c: don't flag the index as dirty for changes to the untracked cache

0 files changed, 0 insertions, 0 deletions