fields is GONE (HttpServer does not support that), you can read the
"normal" HTTP headers available via properties, and you can add
headers. also, it is now possible to set a timeout for KeepAlive (for
those clients that pay attention to it).
this also fixes the broken REST inventory/assets/appearance services,
they should be working again.
testcase for OSHttpResponse will follow.
* This is a HUGE OMG update and will definitely have unknown side effects.. so this is really only for the strong hearted at this point. Regular people should let the dust settle.
* This has been tested to work with most basic functions. However.. make sure you back up 'everything' before using this. It's that big!
* Essentially we're back at square 1 in the testing phase.. so lets identify things that broke.
