unmoderated message in a sub.

Per RFC3659, the correct response for "Good command, but no size for you" is
550, not 500 or 501 (these indicate an inability to parse the command).

This works with Chrome.

The biggest issue was that end tags inside a script element are still part
of the outer document so this:

<b>
<script type="text/javascript">
document.write('Hello!'); // Don't forget the </b>
</script>
</b>

Would be illegal because the <b> tag was ended twice.
*ARGH*

target is deprecated in 4.01 and can not be used by strict... something else
will need to be done.

Make the issue initializer do more stuff.