http://berklix.com/~jhs/src/bsd/fixes/freebsd/ports/jhs/mail/mailman/Makefile.REL=ALL.diff

*** old/ports/mail/mailman/Makefile	Sun Sep 11 12:48:07 2016
--- new-jhs-only/ports/mail/mailman/Makefile	Sun Sep 11 12:47:51 2016
***************
*** 200,204 ****
--- 200,208 ----
  	@${MKDIR} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
  	${ECHO} "This marker file ensures that Python's upgrade-site-packages handles ${PKGNAME}." >${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/mailman-info.txt
  	${INSTALL_SCRIPT} ${PKGINSTALL} ${STAGEDIR}${MAILMANDIR}/bin/FreeBSD-post-install
+ 	mv /usr/local/mailman/Mailman/mm_cfg.py \
+ 		/usr/local/mailman/Mailman/mm_cfg.py.distrib
+ 	ln -s /usr/local/mailman/Mailman/mm_cfg.py \
+ 		/site/usr/local/mailman/Mailman/mm_cfg.py
  
  .include <bsd.port.mk>