support PAM conversations properly

[oditynet]

Hi. i used a 2fa . In a config a pam i added:
"auth requisite 2fact.so"
(a code https://github.com/oditynet/2fact-telegram)

Are you want add 2fa ? for example it is very hard for my DE too.

[javalsai]

That 2fa module seems to interact with PAM in a way that's we don't have to implement specific 2fa support at all. However the current implementation of the PAM conversation is simple enough to take a password but nothing more.

I'll leave this issue open as a way to track proper support for PAM conversations, that should get 2fa working and any other PAM modules someone might have.