[PATCH v2 0/3] fixes for relative_path

Updates since v1:

* New patch 1/3 on t0060, which use umambigous leading path (/foo).
* Call tolower instead of strncasecmp in patch 2/3.
* Rename simple_relative_path to remove_leading_path in patch 3/3.

Jiang Xin (3):
  test: use unambigous leading path (/foo) for mingw
  relative_path should honor dos_drive_prefix
  Use simpler relative_path when set_git_dir

 cache.h               |  1 +
 path.c                | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++
 setup.c               |  5 +---
 t/t0060-path-utils.sh | 60 +++++++++++++++++++++++++----------------------
 4 files changed, 99 insertions(+), 32 deletions(-)