Nothing requires bsd.squirrelmail to be loaded after bsd.port.pre.mk but the PORTDIR.
Convert "${PORTDIR}/mail" to ${.CURDIR}/.. and remove all the pre.mk/post.mk dancine
Reported by: erwin
composing after logging in. This is used for users who log in for the
first time and need to set up their preferences prior to getting started.
WWW: http://squirrelmail.org/plugin_view.php?id=142