mod_proxy on apache2

[Cross posted to c.o.l.n]

Hi

Following Julie Meloni's advice in her book on plone cmf, I am trying to
proxy zope behind apache. I installed apace20 from ports. To do this
proxying, I need mod_proxy. However, the port did not install it (I checked
the contents of /usr/local/libexec/apache2/). But I did find mod_proxy.h
in /usr/local/include/apache2/. Does this mean that I have the module, or
do I need to build it ? How do I go about doing that ?

Thanks.