uCON64 Code (SVN)

- Removed some redundant masking in swap functions.
- Removed redundant use of _stati64() (stat() sufficed).
- Fixed use of reserved indentifier for MinGW-w64 (renamed _truncate() to
truncate_()).
- Made it possible to detect that ucon64_fbswap16() failed.
- Made it possible to detect that ucon64_fwswap32() failed.
- Added check to quick_io_func() whether it could write the requested number of bytes.

- Updated unzip code in libdiscmage in order to address Clang warnings.
+ Updated all dependencies.
+ Did not address existing limitations or bugs.

- GCC 12 & 13 generate -Wuse-after-free when using realloc() properly. The GCC
people love this shit and ignore the specs. Clang 16 and 17 are sane. So are
Visual Studio 2015, 2019 and 2022. I will not go along: added
-Wno-use-after-free.

- Small fix for DragonFly BSD. Not needed for uCON64.

- Set ucon64.newline_before_rom to 0 for --ispad, --strip, --stp, --stpn,
--ins and --insn.

- Fixed link to page explaining the installation of pkgsrc on macOS.

- Fixed --col.
+ Corrected conversion to and from SNES color values.
+ Made distinction between SNES color value and search string.

- Added suppression for warning that was enabled by an early update to Visual
Studio 2022.

- Fixed minor off-by-one issue with --range.

- Added support for DragonFly BSD.