Try other levels when encountering cross domain errors to support primary / backup scenarios
Try other levels when encountering cross domain errors to support primary / backup scenarios

When the primary source is unreachable, Flash will not be able to retrieve its crossdomain.xml and hence raise a security error.
This change treats a security error like any other loading error and skips to the next segment.

neilrackett/flashls,mangui/flashls,mangui/flashls,neilrackett/flashls