Sync with 2.17.6

* maint-2.17:
  Git 2.17.6
  unpack_trees(): start with a fresh lstat cache
  run-command: invalidate lstat cache after a command finished
  checkout: fix bug that makes checkout follow symlinks in leading path

1 files changed, 1 insertions, 0 deletions

diff --git a/cache.h b/cache.h
index 89a107a7f7..c42d1aba60 100644
--- a/cache.h
+++ b/cache.h
@@ -1543,6 +1543,7 @@ extern int has_symlink_leading_path(const char *name, int len);
 extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
 extern int check_leading_path(const char *name, int len);
 extern int has_dirs_only_path(const char *name, int len, int prefix_len);
+extern void invalidate_lstat_cache(void);
 extern void schedule_dir_for_removal(const char *name, int len);
 extern void remove_scheduled_dirs(void);