doc: Add `[deprecated]` after some function names.

It use a little XSS-ish HTML tag injection, but it works

docs/config.ld

@@ -140,6 +140,10 @@ custom_display_name_handler = function(item, default_handler)
         return name ~= "" and name or item.name
     end
 
+    if item.type == "deprecated" then
+        return default_handler(item) .. "</a> <i class=\"deprecated_label\">[deprecated]</i><a>"
+    end
+
     return default_handler(item)
 end
 

docs/ldoc.css

@@ -277,6 +277,11 @@ ul.nowrap {
     padding-right: 15px;
 }
 
+.deprecated_label {
+    color: #9db9f3;
+    font-weight: normal;
+}
+
 /* stop sublists from having initial vertical space */
 ul ul { margin-top: 0px; }
 ol ul { margin-top: 0px; }