Merge branch 'jc/report-path-error-to-dir' into maint

Code clean-up.

* jc/report-path-error-to-dir:
report_path_error(): move to dir.c

diff --cc builtin/ls-files.c
Simple merge

diff --cc cache.h
Simple merge

diff --cc dir.c
Simple merge

diff --cc dir.h
Simple merge