A couple more sizeof issues found and fixed. One of them is
actually another protocol change, but due to a fortuitous accident
it should remain compatible with older versions.
Detailed explanation: When a client attempts to connect to a server that
is already busy, the server is supposed to return ACCESS_DENIED as a
state value. It was doing so, but was writing it as an int, even though
state values are supposed to be signed chars. The client read the value
correctly as a signed char, getting one byte and throwing away the rest.
So why did this ever work? Because ACCESS_DENIED is the value -1, and
any byte of an int -1 equals a signed char -1. If ACCESS_DENIED had been
any other value, this would have been an opvious bug and would have long
since been fixed. As is, it stuck around working by accident until now.
