Only currently supported option is "allowXss" which will send the needed
Access-control-allow-origin: * header to allow xss scripting against
the LSL http server.
type for an HTTP request. Since the "official" LSL function limits
the use of the response type, it is implemented as osSetContentType
with a string for the content mime type and a threat level of high.
With this function you should be able to implement rather functional
media-on-a-prim application with much less difficulty.
