Can anybody tell me where these variables are set?

[www.girls-on-bikes.com]

Hello All,
Can anybody tell me where the {url...} variables are set?
I'd like to add something like the third line:

&raquo; <a href="{url_lost_password}">{lang_lost_password}</a><br />
&raquo; <a href="{url_register}">{lang_register}</a><br />

&raquo; <a href="{url_faq}">{lang_faq}</a></td>

(This was in user_loginform.html by the way)

Thanks!

[V@no]

/includes/page_header.php