Add URI and username/password to help text example

I'm sorry I don't know how to make a patch- this change just adds the !login URI, and username/password to the suggested logintoboggan text at - admin/help/logintoboggan

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!username,

Thank you for registering at !site.

IMPORTANT:
For full site access, you will need to click on this link or copy and paste it in your browser:

!login_url

This will verify your account and log you into the site. In the future you will be able to log in to !login_uri using the username and password that you created during registration:

username: !username
password: !password

-- !site team