add worldgen limit 4080 to go with browser limitations regarding chunkymap

etc/change_world_name_manually_first/game-install-ENLIVEN

@@ -210,6 +210,8 @@ if [ ! -f "$USR_SHARE_MINETEST/games/$MT_MYGAME_NAME/minetest.conf" ]; then
 fi
 cp "$USR_SHARE_MINETEST/games/minetest_game/minetest.conf" "$WRITEABLE_MINETEST_CONF"
 touch "$WRITEABLE_MINETEST_CONF"
+#4080 since boundaries in chunkymap/singleimage.py (to be compatible with approximate browser max image size) are -4096 to 4096
+echo "map_generation_limit = 4080" >> "$WRITEABLE_MINETEST_CONF"
 echo "protector_radius = 7" >> "$WRITEABLE_MINETEST_CONF"
 echo "protector_pvp = true" >> "$WRITEABLE_MINETEST_CONF"
 echo "protector_pvp_spawn = 10" >> "$WRITEABLE_MINETEST_CONF"