The socket is a value to be assigned, not an index to be used. As such there
is no safety check to be done here and doing so just breaks things.
Fixes networking on Windows.
The header length from the tracker is 1 byte larger than the size calculated
by the client due to psnet removing that byte internally. The header length
is adjusted to compensate for this, but only *after* the deserialization
process, so we have to use the received packet size instead.
Should allow for most games, even those behind CG-NAT, to work without having
to set up port forwarding. This set of changes is only needed for game servers
to work with the new feature. No special handling is required for clients, so
any build from the last few years should work for them.
Taylor Richards