SocketAddressWindows.h contains a bunch of copy-pasted Windows
definitions. This started causing ad-nauseam redefinition errors when
implementing the HTTP disk cache for Windows.
Instead, let's forward-declare the types we can in SocketAddress.h and
only define the couple of constants that we need. We can then assert at
compile-time that we defined them correctly.
The kernel was already using the UDP prefix, and the TCP LibCore classes
are also uppercased. Let's rename for consistency.
Also order the LibCore Makefile alphabetically, because everywhere else
seems to be doing that :)
