textarea placeholder [Re: form input placeholder text]

I wrote:
> Everyone's getting into the habit of using the html5
> placeholder attributes on form inputs to tell users
> what the inputs are for, decreasing usability for the
> rest of us, so I implemented it for INPUT text/password.
> (It's also legal on TEXTAREA.)

Here's the code for textarea. I don't expect to commit this one as
quickly, since textarea placeholder doesn't seem to be used as commonly.

http://www.dillo.org/test/textarea_placeholder.diff