-# and so on, up to the limit configured here. The same happens to the reject
-# logs. All those with numbers greater than 1 are compressed.
+# and so on, up to the limit configured here. When the number to keep is
+# greater than 99 (not common, but some people do it), three digits are used
+# (e.g. mainlog.001). The same shuffling happens to the reject logs. All
+# renamed files with numbers greater than 1 are compressed.