Description of problem:
This bug is opened in relation to a feature request for support of blowfish
crypt in shadow/passwd files. libuser should support blowfish in addition to
lib/user.c will have to create 128 bits of salt (not just 128/6 characters),
not separated from the hash with $.
Can't be tested without glibc support, though.
The glibc maintainer decided blowfish support will not be added, see
Rawhide libuser-0.56.7-1 supports SHA256 and SHA512.