if a new directory was found, it is always marked for @dirrm.
But, if the directory is empty, nothing pertaining to it is recorded in
the PLIST... and thanks to pkg_*, we can't record directories in the PLIST.
So, just add an @exec mkdir -p right in front of the @dirrm, up to
the port maintainer to decide whether the @exec mkdir/@dirrm pair is
justified or not (for the port at hand).
if a port sets FAKE=Yes, this means it can be `pre'-installed elsewhere,
with DESTDIR set to WRKINST (=work/fake-${ARCH} by default).
the infrastructure takes care of pre-install/do-install/post-install targets,
assuming those install stuff under PREFIX.
To help ports to cope with DESTDIR, you can set FAKE_FLAGS and FAKE_TARGET
(used for the fake installation).
Ports with FAKE=Yes are the way to go: they can be packaged directly without
a real installation, and the installation proceeds from the package, thus
forcing porters to check the package.
