In
/usr/local/directadmin/custombuild/configure/proftpd/configure.proftpd, there's an --enable-dso, but in http://files.directadmin.com/services/all/sftp/configure.proftpd.sftp (as referenced in https://docs.directadmin.com/other-...ral.html#how-to-install-mod-sftp-into-proftpd), there is not. What's the reason for that? It seems unrelated to any ssl/tls/sftp functionality.