* fixed/implemented the remaining net issues (plain text and ssl connection are fully functional now; at least for ascii/non-binary data -> this is still a TODO)
 * s/int/size_t/ in net classes (all boost asio interfaces use size_t, SDL_net used to use int, so there is no reason to use int any more)
 * increased max "packet" size to 16384 (actually the amount of data that can be read from the socket at once)