Revert "actually disable C4995 and C4996 for udf.cpp"

This reverts commit 03ca3eff5fccbfe6bfc1583789d4fe91af8b1900.
build.bat, mpc-hc_setup.iss : add ICL13 support
update ffmpeg (n0.8-18179-ged37a56)
Work around a libavresample crash
h264.c: remove custom code.  This caused the decoder to show a blank screen when playing back a h264 file in software mode and the AR changed.
clean up project references
ffmpeg: remove custom code
icon.ico: recreate it with more bit depths and 24x24 resolution