[FFmpeg-devel] [PATCH v11 3/6] compat/w32dlfcn.h: Remove MAX_PATH limit and replace LoadLibraryExA with LoadLibraryExW

[nil-admirari at mailo.com]

#if (_WIN32_WINNT < 0x0602) || HAVE_WINRT
#include "libavutil/wchar_filename.h"
#endif

caused build error due to utf8towchar being undefined.

Made wchar_filename.h include unconditional.
Also removed manifest changes since it was decided to adopt \\?\ prefixes instead.

New version is at https://ffmpeg.org/pipermail/ffmpeg-devel/2022-June/297198.html.