[mythtv] MythSocket class

[David Blain]

> 
> Thanks for testing.  I didnt actually touch the http server part of 
> the backend, so its still using QSocket.  I left it as is cause I need 
> to figure out a workaround to handle canReadLine/readLine functions 
> that QSocket provides.

My upnp Patch #1495 completely replaces the http server in the backend.  I
created a Buffered QSocketDevice class that handles the canReadLine/readLine
functions.

David.