Just to say, if I'm reading a config file and see "pam_winbind.so", I have a much better idea of what's going on than if the same file says "winbind" instead.
You already know that it's PAM-related, since it's a PAM config file. What extra info does the `pam_` give you?
.so does give you some info (namely, that it's an external shared object), but I'm not entirely certain how that alone gives you any better idea what's going on: that shared object could do literally anything. You need to know how PAM uses the shared object to know what's going on.
