manuals: Remove references to libpngpf(3); update links

From libpng-1.5.0 onwards, the private libpng functions are no longer
accessible to the libpng users, and the content of libpngpf(3) is no
longer relevant.

Update links, introducing the new canonical location of the libpng
source repository:
https://github.com/pnggroup/libpng
This commit is contained in:
Cosmin Truta
2022-11-27 16:20:31 +02:00
parent b126f80710
commit 5a0b7e9c29
2 changed files with 18 additions and 53 deletions

View File

@@ -5995,35 +5995,25 @@ letter, until version 1.0.6j; from then on they were given the upcoming
public release number plus "betaNN" or "rcNN".
.SH "SEE ALSO"
.IR libpngpf(3) ", " png(5)
.LP
.IR libpng :
.BR "png"(5)
.IP
https://libpng.sourceforge.io/ (follow the [DOWNLOAD] link)
http://www.libpng.org/pub/png
The PNG (Portable Network Graphics) format specification.
.LP
.IR zlib :
.B libpng
.IP
(generally) at the same location as
.I libpng
or at
http://www.libpng.org/pub/png/libpng.html (canonical home page)
.br
https://zlib.net/
https://github.com/pnggroup/libpng (canonical Git repository)
.br
https://libpng.sourceforge.io (downloadable archives)
.LP
.IR PNG specification: RFC 2083
.B zlib
.IP
(generally) at the same location as
.I libpng
or at
https://zlib.net (canonical home page)
.br
https://www.ietf.org/rfc/rfc2083.txt
https://github.com/madler/zlib (canonical Git repository)
.br
or (as a W3C Recommendation) at
.br
https://www.w3.org/TR/REC-png.html
A copy of zlib may also be found at the same location as libpng.
.LP
In the case of any inconsistency between the PNG specification
and this library, the specification takes precedence.
@@ -6043,10 +6033,10 @@ Libpng:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Maintained by Cosmin Truta.
Supported by the PNG development group
Supported by the PNG development group.
.br
png-mng-implement at lists.sourceforge.net (subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe).
png-mng-implement at lists.sourceforge.net. (Subscription is required;
visit https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe.)
.\" end of man page