Add LM hashes

[solardiz]

I just tweeted 3 LM half-hash collisions (which give more full LM hash collisions as the halves can be mixed) in https://x.com/solardiz/status/1903518629699658069 - would this be a welcome addition here, or is LM hash not supported in PHP?

A few LM hash collisions e.g. for robustness testing of password crackers:
db82323cb0693862: 2275490 or 0/*LUZ@
44b3b60db75c15c1: 2716388 or 1}DC<XT
585e239d32df1998: 8351762 or $;)5D|X
Append empty string hash aad3b435b51404ee to these halves for full LM hashes or mix the halves

Incidentally, these 3 (or their combinations for length 14) represent the entirety of overlap between all-digits and other printable ASCII (for all lengths, not just 7 or 14)

BTW, I searched this space and found these in half an hour on one Vega 64 GPU with unmodified JtR (I say "unmodifed" because https://github.com/spaze/hashes suggests using modified hashcat for these tasks) 
@spazef0rze

john -form=lm-opencl -mask=?a -max-len=7 -keep-guessing -v=1 lm-digits

[spaze]

Awesome, thanks! PHP doesn't natively support LM hashes, but there's no reason to not have them here. There already are hashes that are not supported natively like the Quark or Spongent hashes.

I have added them only to the README file for now, and will have to think about how to add them in a better way to distinguish these real collisions from the magic hashes. I have some ideas, let's see.

[spaze]

Added also as an extra file now lm-real.md