Don't skip audit before exitting cleanup_exit

Don't skip audit before exitting cleanup_exit

This fixes an issue where the SSH_CONNECTION_ABANDON event is not
audited because cleanup_exit overrides the regular _exit too soon and
as a result, failed auth attempts are not logged correctly.

The problem was introduced in 81c1099d22b81ebfd20a334ce986c4f753b0db29
where the code from upstream was merged before the audit_event call when
it should have been merged right before the _exit call in order to honor
the comment that just mentions an override of the exit value.