[libpng14] Fix links in man page

3 files changed, 15 insertions, 11 deletions

diff --git a/libpng-1.4.17beta01.txt b/libpng-1.4.17beta01.txt
index e343ebc54..9d05017c9 100644
--- a/libpng-1.4.17beta01.txt
+++ b/libpng-1.4.17beta01.txt
@@ -62,7 +62,7 @@ The PNG-1.0 specification is available as RFC 2083
 W3C Recommendation <http://www.w3.org/TR/REC-png-961001>.
 
 Some additional chunks are described in the special-purpose public chunks
-documents at <http://www.libpng.org/pub/png/documents/>.
+documents at <http://www.libpng.org/pub/png/spec/register/>
 
 Other information
 about PNG, and the latest version of libpng, can be found at the PNG home
@@ -84,7 +84,7 @@ majority of the needs of its users.
 
 Libpng uses zlib for its compression and decompression of PNG files.
 Further information about zlib, and the latest version of zlib, can
-be found at the zlib home page, <http://www.info-zip.org/pub/infozip/zlib/>.
+be found at the zlib home page, <http://zlib.net/>.
 The zlib compression utility is a general purpose utility that is
 useful for more than PNG files, and can be used without libpng.
 See the documentation delivered with zlib for more details.
@@ -1068,9 +1068,11 @@ the normalized graylevel is computed:
     int bw = 65536 - (rw + gw);
     gray = (rw*red + gw*green + bw*blue)/65536;
 
-The default values approximate those recommended in the Charles
-Poynton's Color FAQ, <http://www.inforamp.net/~poynton/>
-Copyright (c) 1998-01-04 Charles Poynton <poynton at inforamp.net>
+The defaults correspond to the ITU-R recommendation 709, and also the sRGB
+color space, as recommended in the Charles Poynton's Colour FAQ,
+Copyright (c) 2006-11-28 Charles Poynton, in section 9:
+
+<http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html#RTFToC9>
 
     Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
 
diff --git a/libpng.3 b/libpng.3
index 4ef16a3eb..48474a23f 100644
--- a/libpng.3
+++ b/libpng.3
@@ -504,7 +504,7 @@ The PNG-1.0 specification is available as RFC 2083
 W3C Recommendation <http://www.w3.org/TR/REC-png-961001>.
 
 Some additional chunks are described in the special-purpose public chunks
-documents at <http://www.libpng.org/pub/png/documents/>.
+documents at <http://www.libpng.org/pub/png/spec/register/>
 
 Other information
 about PNG, and the latest version of libpng, can be found at the PNG home
@@ -526,7 +526,7 @@ majority of the needs of its users.
 
 Libpng uses zlib for its compression and decompression of PNG files.
 Further information about zlib, and the latest version of zlib, can
-be found at the zlib home page, <http://www.info-zip.org/pub/infozip/zlib/>.
+be found at the zlib home page, <http://zlib.net/>.
 The zlib compression utility is a general purpose utility that is
 useful for more than PNG files, and can be used without libpng.
 See the documentation delivered with zlib for more details.
@@ -1510,9 +1510,11 @@ the normalized graylevel is computed:
     int bw = 65536 - (rw + gw);
     gray = (rw*red + gw*green + bw*blue)/65536;
 
-The default values approximate those recommended in the Charles
-Poynton's Color FAQ, <http://www.inforamp.net/~poynton/>
-Copyright (c) 1998-01-04 Charles Poynton <poynton at inforamp.net>
+The defaults correspond to the ITU-R recommendation 709, and also the sRGB
+color space, as recommended in the Charles Poynton's Colour FAQ,
+Copyright (c) 2006-11-28 Charles Poynton, in section 9:
+
+<http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html#RTFToC9>
 
     Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
 
diff --git a/png.5 b/png.5
index 29d6bb303..61733f582 100644
--- a/png.5
+++ b/png.5
@@ -27,7 +27,7 @@ PNG specification (second edition), November 2003:
 PNG 1.2 specification, July 1999:
 .IP
 .br
-http://www.libpng.org/pub/png
+http://png-mng.sourceforge.net/pub/png/spec/1.2/
 .LP
 PNG 1.0 specification, October 1996:
 .IP