Rename /move_area to /move_area_by so it doesn't conflict with another command

Author: luk3yx

README.md

@@ -101,7 +101,7 @@ Commands
 
   * `/area_open <ID>` -- Toggle open/closed the specified area for everyone.
 
-  * `/move_area <ID> <X|Y|Z> <Amount>` -- Moves an area in the specified
+  * `/move_area_rel <ID> <X|Y|Z> <Amount>` -- Moves an area in the specified
     direction.
     For example, to move area 1 west by 10 nodes:
 

chatcommands.lua

@@ -500,7 +500,7 @@ local function move_or_resize_area(name, param, resize)
 	local id, dir, amount = param:match("^(%d+)%s([XYZxyz])%s([%-%d]+)$")
 	amount = tonumber(amount)
 	if not amount then
-		return false, S("Invalid usage, see /help @1.", resize and "resize_area" or "move_area")
+		return false, S("Invalid usage, see /help @1.", resize and "resize_area" or "move_area_by")
 	end
 
 	id = tonumber(id)
@@ -538,7 +538,7 @@ local function move_or_resize_area(name, param, resize)
 	return true, resize and S("Area resized.") or S("Area moved.")
 end
 
-minetest.register_chatcommand("move_area", {
+minetest.register_chatcommand("move_area_by", {
 	params = S("<ID>").." "..S("<X|Y|Z>").." "..S("<Amount>"),
 	description = S("Moves an area"),
 	func = function(name, param)