Make sure that sign up confirmation emails use the correct URL (and port)

[jmuheim]

Don't know whether this is new, but should be investigated further.

The "Confirm my account!" link in the sign up process links to port 3000, but should link to 3001.

[jmuheim]

Also see:

• Rails test env: why does it need default_url_options for ActionMailer?
• How to change Rails 3 server default port in develoment?