Rewrite slightly to use the new 6d facedir prediction code in builtin.

Keeps the old behavior of sneak == force wall (rather than invert).

Add protection/ownership checking.  Can be phased out later after protection
mods start taking advantage of the engine's built-in ownershi-checking
functions.

Got rid of the /st command, since it didn't work anyway.

Minor re-arrangement of init.lua to put the mod's title block at the top
where it belongs :-)

ownership.lua

@@ -0,0 +1,35 @@
+
+local S = moreblocks.gettext
+
+function moreblocks.node_is_owned(pos, placer)
+	local ownername = false
+	if type(IsPlayerNodeOwner) == "function" then					-- node_ownership mod
+		if HasOwner(pos, placer) then						-- returns true if the node is owned
+			if not IsPlayerNodeOwner(pos, placer:get_player_name()) then
+				if type(getLastOwner) == "function" then		-- ...is an old version
+					ownername = getLastOwner(pos)
+				elseif type(GetNodeOwnerName) == "function" then	-- ...is a recent version
+					ownername = GetNodeOwnerName(pos)
+				else
+					ownername = S("someone")
+				end
+			end
+		end
+
+	elseif type(isprotect)=="function" then 					-- glomie's protection mod
+		if not isprotect(5, pos, placer) then
+			ownername = S("someone")
+		end
+	elseif type(protector)=="table" and type(protector.can_dig)=="function" then 					-- Zeg9's protection mod
+		if not protector.can_dig(5, pos, placer) then
+			ownername = S("someone")
+		end
+	end
+
+	if ownername ~= false then
+		minetest.chat_send_player( placer:get_player_name(), S("Sorry, %s owns that spot."):format(ownername) )
+		return true
+	else
+		return false
+	end
+end