Sync with Git 2.14.4

* maint-2.14:
  Git 2.14.4
  Git 2.13.7
  verify_path: disallow symlinks in .gitmodules
  update-index: stat updated files earlier
  verify_dotfile: mention case-insensitivity in comment
  verify_path: drop clever fallthrough
  skip_prefix: add case-insensitive variant
  is_{hfs,ntfs}_dotgitmodules: add tests
  is_ntfs_dotgit: match other .git files
  is_hfs_dotgit: match other .git files
  is_ntfs_dotgit: use a size_t for traversing string
  submodule-config: verify submodule names as paths

diff --cc apply.c
Simple merge

diff --cc builtin/submodule--helper.c
Simple merge

diff --cc builtin/update-index.c
Simple merge

diff --cc cache.h
Simple merge

diff --cc git-compat-util.h
Simple merge

diff --cc path.c
Simple merge

diff --cc read-cache.c
Simple merge

diff --cc submodule-config.c
Simple merge

diff --cc submodule-config.h
index e3845831f6cbd25097ea54b3e2246faa8a32e192,634fe39565cedfb4f242322d74a7096ead339556..93880cf0217aa3516c1f435934b8adad25ae2867
--- 1/submodule-config.h
--- 2/submodule-config.h
+++ b/submodule-config.h
@@@ -34,15 -33,26 +34,22 @@@ extern int option_fetch_parse_recurse_s
                                                 const char *arg, int unset);
  extern int parse_update_recurse_submodules_arg(const char *opt, const char *arg);
  extern int parse_push_recurse_submodules_arg(const char *opt, const char *arg);
 -extern int parse_submodule_config_option(const char *var, const char *value);
 -extern int submodule_config_option(struct repository *repo,
 -                                 const char *var, const char *value);
 +extern void repo_read_gitmodules(struct repository *repo);
 +extern void gitmodules_config_oid(const struct object_id *commit_oid);
  extern const struct submodule *submodule_from_name(
 -              const unsigned char *commit_or_tree, const char *name);
 +              const struct object_id *commit_or_tree, const char *name);
  extern const struct submodule *submodule_from_path(
 -              const unsigned char *commit_or_tree, const char *path);
 +              const struct object_id *commit_or_tree, const char *path);
  extern const struct submodule *submodule_from_cache(struct repository *repo,
 -                                                  const unsigned char *treeish_name,
 +                                                  const struct object_id *treeish_name,
                                                    const char *key);
 -extern int gitmodule_sha1_from_commit(const unsigned char *commit_sha1,
 -                                    unsigned char *gitmodules_sha1,
 -                                    struct strbuf *rev);
  extern void submodule_free(void);
  
+ /*
+  * Returns 0 if the name is syntactically acceptable as a submodule "name"
+  * (e.g., that may be found in the subsection of a .gitmodules file) and -1
+  * otherwise.
+  */
+ int check_submodule_name(const char *name);
+ 
  #endif /* SUBMODULE_CONFIG_H */

diff --cc utf8.c
Simple merge