Domains beginning with "w" have their first letter stripped in the default email address.

[dave-js]

The default email address in incorrectly calculated by get_default_email_address(), which misuses ltrim to strip "www." from the start of the domain. This means that the default email address for any domain starting with "w" has that first letter stripped, too.

E.g. The default email for wordpress.org would be wp2fa@ordpress.org.

Fix here: #113