Import signals on tunnels and bridges patch

http://www.tt-forums.net/viewtopic.php?p=1140215#p1140215

src/table/settings.ini

@@ -538,6 +538,20 @@ str      = STR_CONFIG_SETTING_MAX_TUNNEL_LENGTH
 strhelp  = STR_CONFIG_SETTING_MAX_TUNNEL_LENGTH_HELPTEXT
 strval   = STR_CONFIG_SETTING_TILE_LENGTH
 
+[SDT_VAR]
+base     = GameSettings
+var      = construction.simulated_wormhole_signals
+type     = SLE_UINT8
+flags    = 0
+def      = 2
+min      = 1
+max      = 16
+str      = STR_CONFIG_SETTING_SIMULATE_SIGNALS
+strval   = STR_CONFIG_SETTING_SIMULATE_SIGNALS_VALUE
+proc     = RedrawScreen
+from     = 0
+cat      = SC_BASIC
+
 # construction.longbridges
 [SDT_NULL]
 length   = 1