Change to support serial ports on multiplexer devices without any changes to existing multiplexer device emulation code.

Added support for per line tcp listen ports.
Added support for per line outgoing tcp/telnet connections.

Removed DEV_NET from pdp11_dz and pdp11_vh emulators to allow proper restore of

sim_sock.h

@@ -23,6 +23,8 @@
    used in advertising or otherwise to promote the sale, use or other dealings
    in this Software without prior written authorization from Robert M Supnik.
 
+   15-Oct-12    MP      Added definitions needed to detect possible tcp 
+                        connect failures
    25-Sep-12    MP      Reworked for RFC3493 interfaces supporting IPv6 and IPv4
    04-Jun-08    RMS     Addes sim_create_sock, for IBM 1130
    14-Apr-05    RMS     Added WSAEINPROGRESS (from Tim Riker)
@@ -54,6 +56,9 @@
 #define SOCKET          int32
 #define WSAEWOULDBLOCK  EWOULDBLOCK
 #define WSAEINPROGRESS  EINPROGRESS
+#define WSAETIMEDOUT    ETIMEDOUT
+#define WSAECONNREFUSED ECONNREFUSED
+#define WSAEHOSTUNREACH EHOSTUNREACH
 #define INVALID_SOCKET  ((SOCKET)-1) 
 #define SOCKET_ERROR    -1
 #include <sys/types.h>                                  /* for fcntl, getpid */