Merge branch 'js/maint-1.6.0-path-normalize'

* js/maint-1.6.0-path-normalize:
Remove unused normalize_absolute_path()
Test and fix normalize_path_copy()
Fix GIT_CEILING_DIRECTORIES on Windows
Move sanitary_path_copy() to path.c and rename it to normalize_path_copy()
Make test-path-utils more robust against incorrect use

diff --cc cache.h
Simple merge

diff --cc path.c
Simple merge

diff --cc setup.c
Simple merge