Add company rate limit for land area purchasing

src/table/settings.ini

@@ -553,6 +553,30 @@ max      = 1 << 30
 interval = 1
 cat      = SC_EXPERT
 
+[SDT_VAR]
+base     = GameSettings
+var      = construction.purchase_land_per_64k_frames
+type     = SLE_UINT32
+from     = 0
+def      = 16 << 16
+min      = 0
+max      = 1 << 30
+interval = 1
+cat      = SC_EXPERT
+patxname = ""buy_land_rate_limit.construction.purchase_land_per_64k_frames""
+
+[SDT_VAR]
+base     = GameSettings
+var      = construction.purchase_land_frame_burst
+type     = SLE_UINT16
+from     = 0
+def      = 1024
+min      = 0
+max      = 1 << 30
+interval = 1
+cat      = SC_EXPERT
+patxname = ""buy_land_rate_limit.construction.purchase_land_frame_burst""
+
 [SDT_BOOL]
 base     = GameSettings
 var      = construction.autoslope