Update openid-tool.js

Per ozten's comment:

> I made a mistake, looking at outbound connections
> 
> `if (params['openid.claimed_id'].indexOf('https://me.yahoo.com/a/') !== 0) {`
>
> should be
> 
> `if (params['openid.claimed_id'].indexOf('https://me.yahoo.com/') !== 0) {`
> So that Yahoo can very the rest of the URL.
>
> I'm offline until the 16th, can someone grab this?