v4.1.3

• Added an undocumented HttpSource2 source which works the same as
  HttpSource, and uses the same configuration keys and delegate method, but
  is backed by a different HTTP client library. If you are having problems with
  HttpSource, try this one instead. The current implementation of
  HttpSource will probably be replaced by this one in the next major version.
• Fixed a missing resulting_size key in the delegate script's options hash,
  introduced in 4.1.
• Fixed a bug in KakaduNativeProcessor that could cause requests for certain
  scales to fail (or possibly even crash the JVM).
• Fixed the behavior of response-content-disposition query arguments
  containing a filename argument.
• Fixed failing to source-cache non-selectively-readable images when using
  Java2dProcessor or JaiProcessor with the source cache enabled and a source
  for which chunking is enabled.
• The Jetty client used by HttpSource has been downgraded to the version used
  in 4.1.1 due to a bug in the version used in 4.1.2.
• Fixed the behavior of the print_stack_trace_on_error_pages configuration key
  in the context of certain unrecoverable errors.