This is not year 2038 compliant on systems with 32-bit integers.
The call can be replaced with the standard C time() call. On
POSIX systems, time_t is guaranteed to be an integer type.
Now that authentication/authorization and session creation are
happening in the same process, there is no need for a separate call
to finish an auth session. This change prevents the upper software
layers from needing to track whether auth_start_session() has been
called or not.
matt335672