* rewrite of the win32 dedicated console:

1) NET_Sleep() no longer watches for input, Sys_Sleep() added for waiting
     on input.
  2) Added "CtrlHandler" for trapping Ctrl-C and other quit methods not
     handled by signals on windows
  3) Added history support
  4) Added tab completion
  5) Removed automatic cursor/scroll adjustment (too problematic)
  6) Enable mousewheel scrolling
  7) Stop using the InputBuffer for editing

  This seems to work pretty well now, but I jumped the gun on a previous
  commit message by saying you can scroll now without locking up your server.
  That was only true up until the point that a server tried to print to
  the console, at that point it will hang until you release the scroll bar :(
  It may be possible to get around this by using a seperate thread for
  console output, but that's a whole new can of worms.

code/sys/sys_unix.c

@@ -448,3 +448,31 @@ char *Sys_StripAppBundle( char *dir )
 	return cwd;
 }
 #endif // MACOS_X
+
+
+/*
+==================
+Sys_Sleep
+
+Block execution for msec or until input is recieved.
+==================
+*/
+void Sys_Sleep( int msec )
+{
+	fd_set fdset;
+
+	FD_ZERO(&fdset);
+	FD_SET(fileno(stdin), &fdset);
+	if( msec < 0 )
+	{
+		select((fileno(stdin) + 1), &fdset, NULL, NULL, NULL);
+	}
+	else
+	{
+		struct timeval timeout;
+
+		timeout.tv_sec = msec/1000;
+		timeout.tv_usec = (msec%1000)*1000;
+		select((fileno(stdin) + 1), &fdset, NULL, NULL, &timeout);
+	}
+}