Enable allowing/disallowing supply to a station, per cargo

Ctrl-click station cargo rating

src/saveload/extended_ver_sl.cpp

@@ -112,6 +112,7 @@ const SlxiSubChunkInfo _sl_xv_sub_chunk_infos[] = {
 	{ XSLFI_DEBUG,                  XSCF_IGNORABLE_ALL,       1,   1, "debug",                     nullptr, nullptr, "DBGL"      },
 	{ XSLFI_FLOW_STAT_FLAGS,        XSCF_NULL,                1,   1, "flow_stat_flags",           nullptr, nullptr, nullptr        },
 	{ XSLFI_SPEED_RESTRICTION,      XSCF_NULL,                1,   1, "speed_restriction",         nullptr, nullptr, "VESR"         },
+	{ XSLFI_STATION_GOODS_EXTRA,    XSCF_NULL,                1,   1, "station_goods_extra",       nullptr, nullptr, nullptr        },
 	{ XSLFI_NULL, XSCF_NULL, 0, 0, nullptr, nullptr, nullptr, nullptr },// This is the end marker
 };
 

src/saveload/extended_ver_sl.h

@@ -77,6 +77,7 @@ enum SlXvFeatureIndex {
 	XSLFI_DEBUG,                                  ///< Debugging info
 	XSLFI_FLOW_STAT_FLAGS,                        ///< FlowStat flags
 	XSLFI_SPEED_RESTRICTION,                      ///< Train speed restrictions
+	XSLFI_STATION_GOODS_EXTRA,                    ///< Extra station goods entry statuses
 
 	XSLFI_RIFF_HEADER_60_BIT,                     ///< Size field in RIFF chunk header is 60 bit
 	XSLFI_HEIGHT_8_BIT,                           ///< Map tile height is 8 bit instead of 4 bit, but savegame version may be before this became true in trunk