** Ibuffer
+---
+*** A new command 'ibuffer-mark-by-locked' to mark
+all locked buffers; bound to '% L'.
+
+---
+*** A new option 'ibuffer-locked-char' to indicate
+locked buffers; Ibuffer shows a new column displaying
+'ibuffer-locked-char' for locked buffers.
+
---
*** A new command 'ibuffer-unmark-all-marks' to unmark
all buffers without asking confirmation; bound to