pfPorts: Remove pecl-radius port, directly use FreeBSD ports.

We had a unmodified port, upstream still ships same version,
but includes a PHP 5.4 patch.

Now directly use their port which reduces churn once we switch
to this version of PHP.
Merge pull request #82 from matsimon/pecl-radius-removal

pfPorts: Remove pecl-radius port, directly use FreeBSD ports.