+For a suggestion of what gnulib commit might be stable enough for a
+formal release, see the ChangeLog in the latest gnulib snapshot at:
+
+ http://erislabs.net/ianb/projects/gnulib/
+
+The autoconf files we use are currently:
+
+ m4/m4.m4
+ lib/m4sugar/m4sugar.m4
+ lib/m4sugar/foreach.m4
+
+These files don't change very often in autoconf, so it should be
+relatively straight-forward to examine the differences in order to
+decide whether to update.