Mgflat: Set blank default spflags. Unhide

builtin/settingtypes.txt

@@ -936,7 +936,7 @@ mgv7_np_cave2 (Mapgen v7 cave2 noise parameters) noise_params 0, 12, (100, 100,
 #    Occasional lakes and hills added to the flat world.
 #    Flags that are not specified in the flag string are not modified from the default.
 #    Flags starting with "no" are used to explicitly disable them.
-mgflat_spflags (Mapgen flat flags) flags nolakes,nohills lakes,hills,nolakes,nohills
+mgflat_spflags (Mapgen flat flags) flags  lakes,hills,,nolakes,nohills
 
 #    Y of flat ground.
 mgflat_ground_level (Mapgen flat ground level) int 8

minetest.conf.example

@@ -1187,8 +1187,8 @@
 #    Occasional lakes and hills added to the flat world.
 #    Flags that are not specified in the flag string are not modified from the default.
 #    Flags starting with "no" are used to explicitly disable them.
-#    type: flags possible values: lakes, hills, nolakes, nohills
-# mgflat_spflags = nolakes,nohills
+#    type: flags possible values: lakes, hills, , nolakes, nohills
+# mgflat_spflags = 
 
 #    Y of flat ground.
 #    type: int

src/emerge.cpp

@@ -106,7 +106,7 @@ MapgenDesc g_reg_mapgens[] = {
 	{"v5",         new MapgenFactoryV5,         true},
 	{"v6",         new MapgenFactoryV6,         true},
 	{"v7",         new MapgenFactoryV7,         true},
-	{"flat",       new MapgenFactoryFlat,       false},
+	{"flat",       new MapgenFactoryFlat,       true},
 	{"fractal",    new MapgenFactoryFractal,    true},
 	{"singlenode", new MapgenFactorySinglenode, false},
 };