[RFC][VOTE] Argon2i(d) password_hash() via ext/sodium

https://wiki.php.net/rfc/sodium.argon.hash

It took me an extra couple days to update the diff and finalize the
language of the RFC, but it's ready to go and voting has been opened.

-Sara

https://wiki.php.net/rfc/sodium.argon.hash

It took me an extra couple days to update the diff and finalize the
language of the RFC, but it's ready to go and voting has been opened.

Okay. Voting closed. Passes 30:0. I'll merge this by tomorrow evening.

-Sara