The EmailRegistration plugin allows user registration with just an email
address.

When users register, the part before '@' in their email address will become
their nickname/username (normalized). In case of collisions, a auto-increment
number will be added to the username.

For example, if someone registers with "user@example.org", their username
will be "user". If someone else registers with "user@example.net", their
username will be user1, and so on.

Installation
============
add "addPlugin('EmailRegistration');"
to the bottom of your config.php

Note: This plugin is enabled by default on private instances.

Settings
========
none

Example
=======
addPlugin('EmailRegistration');