Re-add MD4 support, if not at least for reading existing .MD4 checksum files?

[NintendoManiac64]

For whatever reason, on my dual-core Haswell CPU, I measured MD4 to actually be the fastest... (yes, faster than even CRC32).

So for many years I've been using MD4 with the original HashCheck Shell Extension and it'd be nice if I could still access those .MD4 checksums files. I'm not that concerned with the ability to create new MD4 files as I've generally moved on to SHA1 for its more widespread compatibility, but at least being able to read existing .MD4 checksum files would be nice (this is especially true since, now that I'm primarily a Linux user, I can't even use HashCheck Shell Extension at this time for creating checksums)