www-apache/mod_auth_external-3.1.0 was released on 2006-02-17. www-apache/mod_caucho-3.1.2 was released on 2007-07-18. www-apache/mod_layout-5.0 was released on 2007-02-21. www-apache/mod_proxy_html-3.0.0 was released on 2007-07-31. www-apache/pwauth-2.3.2 was released on 2006-02-19.
all in cvs, but be aware that mod_auth_external-3.1.0 is actually called mod_authnz_external ...