misc/far2l: update Far-2-Linux port to version 2.5.3 (sign of mistrust)

• Drop needless dependency on `devel/libfmt' which is not actually used, but was pulled for a quite bizarre reason: "sometimes libstd requires linking to libfmt, sometimes not, if libfmt [found] let's link to it", and prevent its accidental pick up if it's installed on user's system
• Revert to `find_package(LibArchive)' which had been recently replaced with pkgconf(1)-backed in version 2.5.1: this helps CMake to find the base system's library again; use it to handle RAR archives while here
• Amend the list of file suffixes (extensions) which look like archives
• Purge endian-related patch, this code now compiles cleanly on PowerPC

Reported by: portscout
Confirmed by: pkubaj (last item)