file which may contain multiple records when per-tty time stamps
are in use (the default). The time stamps use a monotonic timer
where available and are once again stored in /var/run/sudo. The
lecture status is now stored separately from the time stamps in a
different directory.
on devpts in Linux has been changed to conform to POSIX. As a
result we can no longer assume that the ctime will stay unchanged
throughout the life of the session. We store the session ID in the
time stamp file so there is a much smaller chance of the time stamp
file being reused by a new login. While here, store the uid/gid
in the timestamp file too for good measure.
