SSH port forwarding! How cool is that?

Only currently works on SSH1; SSH2 should be doable but it's late
and I have other things to do tonight. The Cool Guy award for this
one goes to Nicolas Barry, for doing most of the work and actually
understanding the code he was adding to.

[originally from svn r1176]

putty.h

@@ -313,6 +313,9 @@ typedef struct {
     /* X11 forwarding */
     int x11_forward;
     char x11_display[128];
+    /* port forwarding */
+    int lport_acceptall; /* accepts connection from hosts other than localhost */
+    char portfwd[1024]; /* [LR]localport\thost:port\000[LR]localport\thost:port\000\000 */
 } Config;
 
 /*