Merge branch 'jc/nostat'

* jc/nostat:
  cache_name_compare() compares name and stage, nothing else.
  "assume unchanged" git: documentation.
  ls-files: split "show-valid-bit" into a different option.
  "Assume unchanged" git: --really-refresh fix.
  ls-files: debugging aid for CE_VALID changes.
  "Assume unchanged" git: do not set CE_VALID with --refresh
  "Assume unchanged" git

diff-files.c

@@ -193,7 +193,7 @@ int main(int argc, const char **argv)
 			show_file('-', ce);
 			continue;
 		}
-		changed = ce_match_stat(ce, &st);
+		changed = ce_match_stat(ce, &st, 0);
 		if (!changed && !diff_options.find_copies_harder)
 			continue;
 		oldmode = ntohl(ce->ce_mode);