Add RequestTileEntityInteractionHandler. Check Mannequin modif perms.

Users can no longer open a Mannequin if they do not have building permissions at the position of the Mannequin.
(Mannequins work as a chest since 1.4)

TShockAPI/Handlers/RequestTileEntityInteractionHandler.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Terraria.DataStructures;
+using Terraria.GameContent.Tile_Entities;
+using static TShockAPI.GetDataHandlers;
+
+namespace TShockAPI.Handlers
+{
+	/// <summary>
+	/// 
+	/// </summary>
+	public class RequestTileEntityInteractionHandler : IPacketHandler<RequestTileEntityInteractionEventArgs>
+	{
+		public void OnReceive(object sender, RequestTileEntityInteractionEventArgs args)
+		{
+			if (args.TileEntityID != -1)
+			{
+				TileEntity tileEntity;
+				if (TileEntity.ByID.TryGetValue(args.TileEntityID, out tileEntity))
+				{
+					if (tileEntity is TEDisplayDoll)
+					{
+						if (!args.Player.HasBuildPermission(tileEntity.Position.X, tileEntity.Position.Y, false))
+						{
+							args.Player.SendErrorMessage("You have no permission to modify a Mannequin in a protected area!");
+							args.Handled = true;
+							return;
+						}
+					}
+				}
+			}
+		}
+	}
+}