misc/far2l: update the port to version 2.6.4 (aka second chance)

• Drop no longer applicable and hopefully no longer needed ARM64 intrinsic patches as attribute((target("+crypto"))) now apparently works as intended
• Add somewhat hackish SetIcon() call to the GUI initialization routine so users can see the icon in the window title and while alt-tabbing through running programs
• Disable WSL-specific clipboard support code and do not install related Windows-only scripts
• Colorer had been rewritten to use libxml2 instead of Xerces-C

Reported by: portscout
Tested on: ref1{3,4}-aarch64.freebsd.org (clang 18.1.6)