>btw, I think that "net.inet.tcp.maxconn" or the equivalent is probably
>a be

Nope.  It's in the socket layer, in uipc_socket.c. Whatever gets done
will affect SOCK_STREAM (and SOCK_SEQPACKET?) sockets over Appletalk,
TP4, DECnet, XNS, IPX, ..., if and when we have them, not just TCP.