maintenance update to 1.6.23 after Brad sent me an equivalent diff for .22

graphics/png/Makefile

@@ -1,8 +1,8 @@
-# $OpenBSD: Makefile,v 1.111 2016/03/11 19:59:15 naddy Exp $
+# $OpenBSD: Makefile,v 1.112 2016/06/14 17:26:19 naddy Exp $
 
 COMMENT=	library for manipulating PNG images
 
-VERSION=	1.6.20
+VERSION=	1.6.23
 DISTNAME=	libpng-${VERSION}
 PKGNAME=	png-${VERSION}
 CATEGORIES=	graphics
@@ -10,8 +10,8 @@ DPB_PROPERTIES=	parallel
 MASTER_SITES=	${MASTER_SITE_SOURCEFORGE:=libpng/}
 EXTRACT_SUFX=	.tar.xz
 
-SHARED_LIBS=	png16	17.2 \
-		png	17.2
+SHARED_LIBS=	png16	17.3 \
+		png	17.3
 
 HOMEPAGE=	http://www.libpng.org/pub/png/libpng.html
 

graphics/png/distinfo

@@ -1,2 +1,2 @@
-SHA256 (libpng-1.6.20.tar.xz) = VcWVnp80hNlhQaMibFO8naQqSEXnCHnT4dbpSDPRkYs=
-SIZE (libpng-1.6.20.tar.xz) = 942672
+SHA256 (libpng-1.6.23.tar.xz) = bZIee9rsVun2WURj7B/hmBw80tX8kl03geIZtTSSYvE=
+SIZE (libpng-1.6.23.tar.xz) = 961520

graphics/png/patches/patch-tests_pngstest

@@ -1,21 +0,0 @@
-$OpenBSD: patch-tests_pngstest,v 1.1 2015/11/14 20:27:09 naddy Exp $
-
-sh fails to correctly parse case inside $()
-
---- tests/pngstest.orig	Sat Sep 26 00:48:24 2015
-+++ tests/pngstest	Fri Nov 13 23:49:49 2015
-@@ -17,7 +17,7 @@ gamma="$1"
- shift
- alpha="$1"
- shift
--exec ./pngstest --tmpfile "${gamma}-${alpha}-" --log ${1+"$@"} $(
-+exec ./pngstest --tmpfile "${gamma}-${alpha}-" --log ${1+"$@"} `
-    for f in "${srcdir}/contrib/testpngs/"*.png
-    do
-       g=
-@@ -49,4 +49,4 @@ exec ./pngstest --tmpfile "${gamma}-${alpha}-" --log $
-             test "$alpha" = "opaque" -o "$alpha" = "none" && echo "$g";;
-       esac
-    done
--)
-+`