[libpng15] Imported from libpng-1.5.23beta01.tar
diff --git a/LICENSE b/LICENSE
index 7d34e76..1c92b14 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.23beta01, March 26, 2015, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.23beta01, May 21, 2015, are
 Copyright (c) 2004, 2006-2015 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -108,4 +108,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-March 26, 2015
+May 21, 2015
diff --git a/README b/README
index f9a1c2a..6d3a0d0 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.5.23beta01 - March 26, 2015 (shared library 15.0)
+README for libpng version 1.5.23beta01 - May 21, 2015 (shared library 15.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -134,7 +134,7 @@
 to others, if necessary.
 
 Please do not send suggestions on how to change PNG.  We have
-been discussing PNG for nineteen years now, and it is official and
+been discussing PNG for twenty years now, and it is official and
 finished.  If you have suggestions for libpng, however, I'll
 gladly listen.  Even if your suggestion is not used immediately,
 it may be used later.
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 55641dc..584b492 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.23beta01 - March 26, 2015
+ libpng version 1.5.23beta01 - May 21, 2015
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.23beta01 - March 26, 2015
+ libpng versions 0.97, January 1998, through 1.5.23beta01 - May 21, 2015
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
 
@@ -4535,7 +4535,7 @@
 
 XIV. Y2K Compliance in libpng
 
-March 26, 2015
+May 21, 2015
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
diff --git a/libpng.3 b/libpng.3
index 8d57e1a..723cffa 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,4 +1,4 @@
-.TH LIBPNG 3 "March 26, 2015"
+.TH LIBPNG 3 "May 21, 2015"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.23beta01
 .SH SYNOPSIS
@@ -492,7 +492,7 @@
 .SH LIBPNG.TXT
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.23beta01 - March 26, 2015
+ libpng version 1.5.23beta01 - May 21, 2015
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -503,7 +503,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.23beta01 - March 26, 2015
+ libpng versions 0.97, January 1998, through 1.5.23beta01 - May 21, 2015
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
 
@@ -5027,7 +5027,7 @@
 
 .SH XIV. Y2K Compliance in libpng
 
-March 26, 2015
+May 21, 2015
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
@@ -5337,7 +5337,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.23beta01 - March 26, 2015:
+Libpng version 1.5.23beta01 - May 21, 2015:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -5360,7 +5360,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.23beta01, March 26, 2015, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.23beta01, May 21, 2015, are
 Copyright (c) 2004,2006-2015 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -5459,7 +5459,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-March 26, 2015
+May 21, 2015
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 908f813..35e3ddd 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,4 +1,4 @@
-.TH LIBPNGPF 3 "March 26, 2015"
+.TH LIBPNGPF 3 "May 21, 2015"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.23beta01
 (private functions)
diff --git a/png.5 b/png.5
index 10c4c3c..df3153a 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "March 26, 2015"
+.TH PNG 5 "May 21, 2015"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.h b/png.h
index 36dd079..ec1fe59 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.23beta01, March 26, 2015
+ * libpng version 1.5.23beta01, May 21, 2015
  *
  * Copyright (c) 1998-2015 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.5.23beta01, March 26, 2015: Glenn
+ *   libpng versions 0.97, January 1998, through 1.5.23beta01, May 21, 2015: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -241,7 +241,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.23beta01, March 26, 2015, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.23beta01, May 21, 2015, are
  * Copyright (c) 2004, 2006-2015 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -353,7 +353,7 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    March 26, 2015
+ *    May 21, 2015
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
@@ -422,7 +422,7 @@
 /* Version information for png.h - this should match the version in png.c */
 #define PNG_LIBPNG_VER_STRING "1.5.23beta01"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.23beta01 - March 26, 2015\n"
+     " libpng version 1.5.23beta01 - May 21, 2015\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
diff --git a/pngconf.h b/pngconf.h
index aa3723d..26d4040 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.23beta01, March 26, 2015
+ * libpng version 1.5.23beta01, May 21, 2015
  *
  * Copyright (c) 1998-2013 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index 161c256..530cb30 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.5.23beta01 - March 26, 2015
+libpng version 1.5.23beta01 - May 21, 2015
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index 9ade5c2..8b0dc48 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.5.23beta01 - March 26, 2015
+ * libpng version 1.5.23beta01 - May 21, 2015
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index ec054bc..b16cab3 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,5 +1,5 @@
 
-Makefiles for  libpng version 1.5.23beta01 - March 26, 2015
+Makefiles for  libpng version 1.5.23beta01 - May 21, 2015
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 287b502..9311548 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -1,7 +1,7 @@
 /* 1.5.23beta01 STANDARD API DEFINITION */
 /* pnglibconf.h - library build configuration */
 
-/* libpng version 1.5.23beta01 - April 29, 2015 */
+/* libpng version 1.5.23beta01 - May 21, 2015 */
 
 /* Copyright (c) 1998-2013 Glenn Randers-Pehrson */