wininet: Change the HTTP code to not assume that the connection will be closed at the end of every request.

and don't try to read any more than what is available.

wininet: Always send a Connection header set to "close" because that is what we expect for the moment.

wininet: Use correct types for socket functions to avoid warnings when compiling on BSD-based systems.

since that is what the current behaviour is tuned for.

function being called can sometimes take a long time to return and we
almost always want a new thread to be created if there are no free
threads available.

by setting the length correctly and by doing a case-insentive compare
on the GUID string that is returned.

should set the it to have the maximum possible length and size rather
than a modulus of the actual length.

Fix test failures for RtlInitUnicodeString on Windows XP upwards.

ole32: Make sure to reset the message state if it has been changed in RPC_ExecuteCall before returning.

Fix the hrFault parameter passed into the ClientNotify function in 
ClientRpcChannelBuffer_SendReceive so that it is correct in the case of 
messages dispatched with PostMessage.
Only unmarshal ORPCTHAT for non-fault packets.