Log message:
Changes 0.6.5:
* Upgraded libpng to version 1.4.5-optipng [private]
* Upgraded zlib to version 1.2.5-optipng [private]
* Fixed the I/O states (in libpng 1.4.5);
  they caused incorrect file reads in some rare cases.
* Fixed processing of PNG files with chunks of size 0.
* Fixed a display error in the TIFF import.
* Improved checking of the arguments of -f, -zc, -zm and -zs.
* Removed quirks from the rangeset option argument syntax.
* Fixed a build issue under the system-supplied libpng-1.4.
* Resolved forward-compatibility issues regarding libpng-1.5;
  however, the system-supplied libpng-1.5 is not yet supported.
* Added various enhancements to the configure+make build system.

Log message:
png shlib name changed for png>=1.5.0, so bump PKGREVISIONs.

Log message:
Bump PKGREVISION for libpng shlib name change.
Also add some patches to remove use of deprecated symbols and fix other
problems when looking for or compiling against libpng-1.4.x.

Log message:
Changes 0.6.4:
* Added the option -nx.
* Clarified the behavior of -nz and the relation between -nz and -o0.
* Added a filesystem check (resolving normalized paths, symlinks, etc.)
  to better detect when the output overwrites the input.
* Enabled automatic wildcard expansion (i.e. globbing) on Win64.
* Fixed a Unicode build issue on Windows.

Log message:
patch-ac is no longer needed; fixes linking problem

Log message:
Changes 0.6.3:
* Fixed a use-after-free error in the GIF reader.
* Flushed the output log to display the current trial in real time.
* Fixed an error in reporting unrecognized file formats.
* Removed the requirement to "fix" TIFF files that contain unrecognized
  metadata.
* Simplified the option abbreviation rules. Option names can now be
  abbreviated to their shortest unique prefix, as in X11 applications.

Log message:
Add patches from upstream in order to update to 0.6.2.1

Changes:

  * Fix SA34035: Use after free error that can be used to execute arbitrary
    code via a specially crafted GIF image

Log message:
Changes 0.6.2:
* Upgraded libpng to version 1.2.33-optipng [private]
* Put back a speed optimization, accidentally removed in version 0.6,
  allowing singleton trials (-o1) to be bypassed in certain conditions.
* Fixed an array overflow in the BMP reader.
* Fixed the loss of private chunks under the -snip option.
* Produced a more concise on-screen output in the non-verbose mode.
* Added a programming interface to the optimization engine, in order
  to facilitate the development of PNG-optimizing GUI apps and plugins.

Log message:
Changes 0.6.1:
* Upgraded cexcept to version 2.0.1.
* Added a configure script, to be used instead of unix-secure.mak.
* Fixed a build issue that occured when using libpng from the system.
* Fixed processing when image reduction yields an output larger than
  the original.
* Fixed behavior of -preserve.
* Removed displaying of partial progress when abandoning IDATs under
  the -v option.  The percentages displayed were not very accurate.

Changes 0.6:
* Upgraded libpng to version 1.2.29-optipng [private]
* Implemented grayscale(alpha)-to-palette reductions.
* Improved conversion of bKGD info during RGB-to-palette reductions.
* Fixed conversion of bKGD and tRNS during 16-to-8-bit reductions.
* Added support for compressed BMP (incl. PNG-compressed BMP, you bet!)
* Improved the speed of reading raw PNM files.
* Recognized PNG digital signatures (dSIG) and disabled optimization
  in their presence, to preserve their integrity.
* Allowed the user to enforce the optimization of dSIG'ed files.
* Recognized APNG animation files and disabled reductions to preserve
  their integrity.
* Added the -snip option, to allow the user to "snip" one image out of
  a multi-image file, such as animated GIF, multi-page TIFF, or APNG.
* Improved recovery of PNG files with incomplete IDAT.
* Fixed a crash triggered by the use of -log on some platforms.
* Fixed behavior of -out and -dir when the input is already optimized.
* Provided more detailed image information at the start of processing.
* Provided a more detailed summary at the end of processing, under the
  presence of the -v option and/or the occurence of exceptional events.

Log message:
Added support for installation to DESTDIR.