Forbid because of unconfirmed security bugs:

The following buffer overruns have been identified and
	addressed [in 7.2.2]:

	    * in handling long datetime input
	    * in repeat()
	    * in lpad() and rpad() with multibyte
	    * in SET TIME ZONE and TZ env var

databases/postgresql82-server/Makefile

@@ -27,6 +27,8 @@ DISTFILES+=	postgresql-docs-${PORTVERSION}${EXTRACT_SUFX}
 
 MAINTAINER?=	girgen@partitur.se
 
+FORBIDDEN=	"buffer overruns acknowledged by authors--see <URL:http://www3.us.postgresql.org/news.html>"
+
 WRKSRC=		${WRKDIR}/postgresql-${PORTVERSION}
 DIST_SUBDIR=	postgresql