reading any further passwords in the pam conversation function.
Otherwise, if multiple PAM auth methods are required, the user will
have to hit ^C for each one.
Set adminstrative domain for the process when looking up user's
password or group info and when preparing for execve().
Include strings.h even if string.h exists since they may define
different things. Fixes warnings on AIX and others.
before the uid/gid/etc changes. A struct passwd pointer is passed in,which may be NULL if the user does not exist in the passwd database.The sudoers module uses init_session to open the pam session as needed.
