Add setting to scale primary industry cargo production

src/table/settings.ini

@@ -1188,6 +1188,20 @@ strval   = STR_JUST_DECIMAL1
 strhelp  = STR_CONFIG_SETTING_TOWN_CARGO_FACTOR_HELPTEXT
 patxname = ""town_cargo_adj.economy.town_cargo_scale_factor""
 
+[SDT_VAR]
+base     = GameSettings
+var      = economy.industry_cargo_scale_factor
+type     = SLE_INT16
+guiflags = SGF_DECIMAL1
+def      = 0
+min      = -160
+max      = +80
+interval = 1
+str      = STR_CONFIG_SETTING_INDUSTRY_CARGO_FACTOR
+strval   = STR_JUST_DECIMAL1
+strhelp  = STR_CONFIG_SETTING_INDUSTRY_CARGO_FACTOR_HELPTEXT
+patxname = ""industry_cargo_adj.economy.industry_cargo_scale_factor""
+
 ; Vehicles
 
 [SDT_VAR]