default shorturl_domain doesn't include http://

The default value for shorturl_domain is HTTP_HOST

variable_get('shorturl_domain', $_SERVER['HTTP_HOST']);

This actually fails validation if you go to the settings page the first time and just save.

I think it should be changed as below

variable_get('shorturl_domain', 'http://' . $_SERVER['HTTP_HOST']);

in both the settings form and the shorturl_shorten() function.

The patch is from my dev version - which is getting slowly further from the CVS version