doc: Update the png.5 man page to the latest PNG-3 draft specification
Also update libpngpf.3 to explicitly state that the internal functions
should not be used by applications.
diff --git a/libpng.3 b/libpng.3
index 50e389f..51ce6ce 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "February 18, 2025"
+.TH LIBPNG 3 "April 30, 2025"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.47
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.48.git
.SH SYNOPSIS
\fB#include <png.h>\fP
diff --git a/libpngpf.3 b/libpngpf.3
index 9c4dda2..8706f13 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,24 +1,17 @@
-.TH LIBPNGPF 3 "February 18, 2025"
+.TH LIBPNGPF 3 "April 30, 2025"
.SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.47
-(private functions)
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.48.git
.SH SYNOPSIS
-\fB#include \fI"pngpriv.h"
-
-\fBAs of libpng version \fP\fI1.5.1\fP\fB, this section is no longer
-\fP\fImaintained\fP\fB, now that the private function prototypes are hidden in
-\fP\fIpngpriv.h\fP\fB and not accessible to applications. Look in
-\fP\fIpngpriv.h\fP\fB for the prototypes and a short description of each
-function.
+\fB#include "pngpriv.h"\fP
.SH DESCRIPTION
-The functions previously listed here are used privately by libpng and are not
-available for use by applications. They are not "exported" to applications
-using shared libraries.
+As of libpng version 1.5.1, this manual is no longer maintained. The private
+function prototypes, declared in private header files, should not be accessed
+by applications.
.SH "SEE ALSO"
-.BR "png"(5), " libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
+.BR "libpng"(3)
.SH AUTHORS
Cosmin Truta, Glenn Randers-Pehrson
diff --git a/png.5 b/png.5
index ee4a2b2..1de4938 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "February 18, 2025"
+.TH PNG 5 "April 30, 2025"
.SH NAME
png \- Portable Network Graphics (PNG) format
@@ -20,10 +20,10 @@
.SH "SEE ALSO"
.BR "libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
.LP
-PNG Specification (Third Edition) Candidate Recommendation Draft, January 2025:
+PNG Specification (Third Edition) Candidate Recommendation, March 2025:
.IP
.br
-https://www.w3.org/TR/2025/CRD-png-3-20250121/
+https://www.w3.org/TR/2025/CR-png-3-20250313/
.LP
PNG Specification (Second Edition), November 2003:
.IP
