Actually upgrade to 42.2.16

Release notes:	https://jdbc.postgresql.org/documentation/changelog.html#version_42.2.16

databases/postgresql-jdbc/Makefile

@@ -2,7 +2,7 @@
 # $FreeBSD$
 
 PORTNAME=	postgresql
-PORTVERSION=	42.2.15
+PORTVERSION=	42.2.16
 CATEGORIES=	databases java
 MASTER_SITES=	http://jdbc.postgresql.org/download/
 PKGNAMESUFFIX=	-jdbc

databases/postgresql-jdbc/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1598084065
-SHA256 (postgresql-42.2.15.jar) = 6a4067988a05ab1703ff4573897887238fd855ba803457f4766c85b80bf19d0d
-SIZE (postgresql-42.2.15.jar) = 1002873
+TIMESTAMP = 1598269360
+SHA256 (postgresql-42.2.16.jar) = e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
+SIZE (postgresql-42.2.16.jar) = 0