Recognize more fields that aren't atom in format_room_option

src/mod_muc_admin.erl

@@ -950,6 +950,13 @@ format_room_option(OptionString, ValueString) ->
 		subject_author ->ValueString;
 		presence_broadcast ->misc:expr_to_term(ValueString);
 		max_users -> binary_to_integer(ValueString);
+		voice_request_min_interval -> binary_to_integer(ValueString);
+		vcard -> ValueString;
+		vcard_xupdate when ValueString /= <<"undefined">>,
+				   ValueString /= <<"external">> ->
+		    ValueString;
+		lang -> ValueString;
+		pubsub -> ValueString;
 		_ -> misc:binary_to_atom(ValueString)
 	    end,
     {Option, Value}.