[CentOS] Support for Argon2 for password hashing

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