Is there any information on adding support for Argon2? I have been working on my new mailserver and this came up in moving from the default MD5 hash to more 'modern' hashes like SHA256 and SHA512. Then I was pointed to the work behind Argon2, and I see that it is moving through the IRTF cfrg workgroup: draft-irtf-cfrg-argon2-04.txt It is a 'purpose built' hash for passwords, with recommendations that new implementations use it. Of course can't use it if crypt does not support it.... thanks