Add option to give every object a nametag

or change the nametag text of players

doc/lua_api.txt

@@ -2544,6 +2544,19 @@ This is basically a reference to a C++ `ServerActiveObject`
 * `set_properties(object property table)`
 * `get_properties()`: returns object property table
 * `is_player()`: returns true for players, false otherwise
+* `get_nametag_attributes()`
+    * returns a table with the attributes of the nametag of an object
+    * {
+        color = {a=0..255, r=0..255, g=0..255, b=0..255},
+        text = "",
+      }
+* `set_nametag_attributes(attributes)`
+    * sets the attributes of the nametag of an object
+    * `attributes`:
+      {
+        color = ColorSpec,
+        text = "My Nametag",
+      }
 
 ##### LuaEntitySAO-only (no-op for other objects)
 * `setvelocity({x=num, y=num, z=num})`
@@ -2644,17 +2657,6 @@ This is basically a reference to a C++ `ServerActiveObject`
     * in first person view
     * in third person view (max. values `{x=-10/10,y=-10,15,z=-5/5}`)
 * `get_eye_offset()`: returns offset_first and offset_third
-* `get_nametag_attributes()`
-    * returns a table with the attributes of the nametag of the player
-    * {
-        color = {a=0..255, r=0..255, g=0..255, b=0..255},
-      }
-* `set_nametag_attributes(attributes)`
-    * sets the attributes of the nametag of the player
-    * `attributes`:
-      {
-        color = ColorSpec,
-      }
 
 ### `InvRef`
 An `InvRef` is a reference to an inventory.
@@ -3232,6 +3234,8 @@ Definition tables
         automatic_face_movement_dir = 0.0,
     --  ^ automatically set yaw to movement direction; offset in degrees; false to disable
         backface_culling = true, -- false to disable backface_culling for model
+        nametag = "", -- by default empty, for players their name is shown if empty
+        nametag_color = <color>, -- sets color of nametag as ColorSpec
     }
 
 ### Entity definition (`register_entity`)