(274) Added --enable-debug configure flag. Currently it only turns on X11
event tracing, but in the future we could add more.
+
+(275) Cleaned up CreateNotify/ConfigureNotify handling.
+
+(276) When a window is iconified, only an UnmapNotify is sent, not a
+VisibilityNotify, so we have to handle the window status callback in the
+former case, too. This fixes bug #763442 (Call the visibility callback when
+minimizing a window).
+
+(277) Removed redundant files from EXTRA_DIST.