[libpng17] Fix URL in documentation.
diff --git a/README b/README
index 662e2ad..174d5ad 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.7.0beta88 - April 1, 2017 (shared library 17.0)
+README for libpng version 1.7.0beta88 - May 22, 2017 (shared library 17.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -23,7 +23,7 @@
 png_uint_32, which will affect shared-library applications that use
 this function.
 
-To avoid problems with changes to the internals of png info_struct,
+To avoid problems with changes to the internals of the png info_struct,
 new APIs have been made available in 0.95 to avoid direct application
 access to info_ptr.  These functions are the png_set_<chunk> and
 png_get_<chunk> functions.  These functions should be used when
@@ -88,11 +88,11 @@
 
 You may also want a copy of the PNG specification.  It is available
 as an RFC, a W3C Recommendation, and an ISO/IEC Standard.  You can find
-these at http://www.libpng.org/pub/png/documents/
+these at http://www.libpng.org/pub/png/pngdocs.html .
 
 This code is currently being archived at libpng.sourceforge.io in the
-[DOWNLOAD] area, and at ftp://ftp.simplesystems.org.  If you can't find it
-in any of those places, e-mail me, and I'll help you find it.
+[DOWNLOAD] area, and at ftp://ftp-osl.osuosl.org/pub/libpng/src .  If you
+can't find it in any of those places, e-mail me, and I'll help you find it.
 
 I am not a lawyer, but I believe that the Export Control Classification
 Number (ECCN) for libpng is EAR99, which means not subject to export
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 7370322..172aa71 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,9 +1,9 @@
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.7.0beta88 - April 1, 2017
+ libpng version 1.7.0beta88 - May 22, 2017
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
- Copyright (c) 1998-2015 Glenn Randers-Pehrson
+ Copyright (c) 1998-2017 Glenn Randers-Pehrson
 
  This document is released under the libpng license.
  For conditions of distribution and use, see the disclaimer
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.7.0beta88 - April 1, 2017
+ libpng versions 0.97, January 1998, through 1.7.0beta88 - May 22, 2017
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2015 Glenn Randers-Pehrson
 
@@ -3837,7 +3837,7 @@
 particular layout of channel data and, if present, alpha values.  There are
 separate defines for each of the two channel encodings.
 
-A format is built up using single bit flag values.  Not all combinations are
+A format is built up using one-bit flag values.  Not all combinations are
 valid: use the bit flag values below for testing a format returned by the
 read APIs, but set formats from the derived values.
 
@@ -5189,7 +5189,7 @@
 going back to version 0.70.  You can access the git repository (read only)
 at
 
-    https://git.code.sf.net/p/libpng/code.git
+    git://git.code.sf.net/p/libpng/code.git
 
 or you can browse it with a web browser by selecting the "code" button at
 
diff --git a/libpng.3 b/libpng.3
index 54bce93..a1b3fc0 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,4 +1,4 @@
-.TH LIBPNG 3 "April 3, 2017"
+.TH LIBPNG 3 "May 22, 2017"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta88
 .SH SYNOPSIS
@@ -500,10 +500,10 @@
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.7.0beta88 - April 3, 2017
+ libpng version 1.7.0beta88 - May 22, 2017
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
- Copyright (c) 1998-2015 Glenn Randers-Pehrson
+ Copyright (c) 1998-2017 Glenn Randers-Pehrson
 
  This document is released under the libpng license.
  For conditions of distribution and use, see the disclaimer
@@ -511,7 +511,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.7.0beta88 - April 3, 2017
+ libpng versions 0.97, January 1998, through 1.7.0beta88 - May 22, 2017
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2015 Glenn Randers-Pehrson
 
@@ -4337,7 +4337,7 @@
 particular layout of channel data and, if present, alpha values.  There are
 separate defines for each of the two channel encodings.
 
-A format is built up using single bit flag values.  Not all combinations are
+A format is built up using one-bit flag values.  Not all combinations are
 valid: use the bit flag values below for testing a format returned by the
 read APIs, but set formats from the derived values.
 
@@ -5689,7 +5689,7 @@
 going back to version 0.70.  You can access the git repository (read only)
 at
 
-    https://git.code.sf.net/p/libpng/code.git
+    git://git.code.sf.net/p/libpng/code.git
 
 or you can browse it with a web browser by selecting the "code" button at
 
@@ -6020,7 +6020,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.7.0beta88 - April 3, 2017:
+Libpng version 1.7.0beta88 - May 22, 2017:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -6045,7 +6045,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000 through 1.7.0beta88, April 3, 2017 are
+libpng versions 1.0.7, July 1, 2000 through 1.7.0beta88, May 22, 2017 are
 Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -6170,7 +6170,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-April 3, 2017
+May 22, 2017
 
 .\" end of man page