Honor user's umask.

Fix the last two holdouts that forced mode bits stricter than the user's umask.
Noticed by Wolfgang Denk and fixed by Linus.

[jc: applied the same fix to mailsplit just for the sake of consistency.]
Signed-off-by: NJunio C Hamano <junkio@cox.net>

index.c

@@ -29,7 +29,7 @@ int hold_index_file_for_update(struct cache_file *cf, const char *path)
 		signal(SIGINT, remove_lock_file_on_signal);
 		atexit(remove_lock_file);
 	}
-	return open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0600);
+	return open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0666);
 }
 
 int commit_index_file(struct cache_file *cf)

mailsplit.c

@@ -128,7 +128,7 @@ int main(int argc, char **argv)
 		unsigned long len = parse_email(map, size);
 		assert(len <= size);
 		sprintf(name, "%04d", ++nr);
-		fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
+		fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666);
 		if (fd < 0) {
 			perror(name);
 			exit(1);