Merge branch 'jk/config-warn-on-inaccessible-paths'

The attribute system may be asked for a path that itself or its
leading directories no longer exists in the working tree.  Failure
to open per-directory .gitattributes with error status other than
ENOENT and ENOTDIR are diagnosed.

* jk/config-warn-on-inaccessible-paths:
  attr: failure to open a .gitattributes file is OK with ENOTDIR

attr.c

@@ -353,7 +353,7 @@ static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
 	int lineno = 0;
 
 	if (!fp) {
-		if (errno != ENOENT)
+		if (errno != ENOENT && errno != ENOTDIR)
 			warn_on_inaccessible(path);
 		return NULL;
 	}