Limit pgsql to 9.2 on four databases category ports

As the result of a recent exp-run for postgresql 9.3, several ports
failed to build as a result.  Most could likely be fixed by updating the
port to a later available version.  Until that happens, set the maximum
version of pgsql to 9.2 for these ports.

  * pg_rman (1.23)       : version 1.27 is available
  * pg_statsinfo (2.4.1) : version 2.5.0 available, works on pgsql 9.3
  * pgpool-II (3.1.6)    : version 3.4 available, works on pgsql 9.3
  * pgpool-II30 (3.0.4)

PR:	195281

databases/pg_rman/Makefile

@@ -9,7 +9,7 @@ MASTER_SITES=	http://pg-rman.googlecode.com/files/
 MAINTAINER=	kuriyama@FreeBSD.org
 COMMENT=	Online backup and restore tool for PostgreSQL
 
-USES=		gmake pgsql
+USES=		gmake pgsql:9.2-
 WANT_PGSQL=	client server
 MAKE_ARGS=	USE_PGXS=1
 PLIST_FILES=	bin/pg_rman

databases/pg_statsinfo/Makefile

@@ -8,7 +8,7 @@ MASTER_SITES=	http://pgfoundry.org/frs/download.php/3429/
 MAINTAINER=	kuriyama@FreeBSD.org
 COMMENT=	Monitor statistics and activity of PostgreSQL
 
-USES=		gmake pgsql
+USES=		gmake pgsql:9.2-
 WANT_PGSQL=	server
 
 MAKE_ARGS=	USE_PGXS=1 LDFLAGS=-lkvm

databases/pgpool-II-30/Makefile

@@ -15,7 +15,7 @@ LICENSE=	MIT
 
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
-USES=		gmake pgsql libtool
+USES=		gmake pgsql:9.2- libtool
 USE_LDCONFIG=	yes
 
 CONFLICTS=	pgpool-3.* pgpool-II-3.* pgpool-II-22-* pgpool-II-23-* 

databases/pgpool-II/Makefile

@@ -15,7 +15,7 @@ LICENSE=	MIT
 
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
-USES=		gmake pgsql libtool
+USES=		gmake pgsql:9.2- libtool
 USE_LDCONFIG=	yes
 USE_OPENSSL=	yes
 CONFIGURE_ARGS=	--with-openssl