distri: 20x faster initramfs (initrd) from scratch

Hey,

I just published a blog post about a custom proof-of-concept initramfs
generator (minitrd):

https://michael.stapelberg.ch/posts/2020-01-21-initramfs-from-scratch-golang/

This demonstrates that there is still a whole bunch of optimization
potential in existing initramfs generators such as dracut :)

Thanks,
Best regards,
Michael