Comment 3 for bug 484069

I guess drizzled should be fine; common-auth (for Debian; Gentoo uses system-auth) is usually include'd from the service-specific configuration files (having the generic name used directly by the service is a bad idea for how PAM is structured).

In the case of Gentoo, I'd be creating the pam file on ebuild (distribution) level anyway, and it'll simply be including system-auth (the equivalent of common-auth on our side).