Tweak RUN_DEPENDS, switching to file-based django detection, instead of
by package name.
This ensures that if a port that depends on this one, also depends on a
different django version, it will see and use the installed version,
rather than attempting to install another one, which results in a
conflict as all django ports conflict with each other.
www/py-django-dpaste depends on py-django-mptt but is about to be
limited to Django <= 1.6 (it does not currently support higher).
Since py-django-mptt depends on www/py-django (currently 1.8.x), this
results in the conflict described above.
The same change will also be made in www/py-django-dpaste for any ports
that may depend on *it* in the future.
This change is a NOOP for other conditions.
See r390184 [1] for another instance of this issue.
[1] https://svnweb.freebsd.org/changeset/ports/390184
Approved by: portmgr (blanket: trivial, tested, build fixes)
f49f666a0a