How do I configure PHP to use curl?

[John Almberg]

I just ran into something that has me stumped. It's probably a real  
newbie question, but I can't figure it out...

I'm trying to add curl support to my PHP installation, but when I run  
'make config' in the /usr/ports/lang/php5 directory, curl is not one  
of the very small set of options given.

PHP has a million options, so how do you set one that is not in the  
'make config' box?

-- John