The original design of QIOTask was intended to simplify lifecycle
management by automatically freeing it when the task was marked as
complete. This overlooked the fact that when a QIOTask is used in
combination with a GSource, there may be times when the source
callback is never invoked. This is typically when a GSource is
released before any I/O event arrives. In such cases it is not
desirable to mark a QIOTask as complete, but it still needs to be
freed. To satisfy this, the task must be released manually.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>