Delete link for plan.ja/; link builtin-char.html.ja instead of
-rw-r--r-- 952 ChangeLog
-rw-r--r-- 23999 history.html.ja.iso-2022-jp
drwxr-xr-x - images
-rw-r--r-- 9535 index.html.ja.iso-2022-jp
drwxr-xr-x - papers
drwxr-xr-x - plan.ja
drwxr-xr-x - xemacs