ports/77391: Apache 2.x Modules depending on wrong Apache port

[Scot Hetzel]

I didn't notice ${PORTDIRS} when I removed <bsd.port.pre.mk>.  After
applying the patch in this PR, you'll need to change:

    ${PORTSDIR}/www/

to

   ${.CURDIR}/../

In all the affected ports except for mod_frontpage2-rtr, as it is
using ${.CURDIR}/../.

clement has reverted his change to "Makefiles.modules.3rd" back to
revision 1.17 in www/apache2.  If we make these changes now, then when
he puts it back in, it won't break theses ports again :).

Scot