This patch addresses a problem where the status counters for a
closing connection may increase after they have been added to
the global status totals, and then decrease when the associated
THD is deleted. This temporary bump in the counters can confuse
monitoring processes.

To fix the problem, add_to_status() is moved to the end of
THD::release_resources(), ensuring that status counter
increments will be added to the global status totals.