- * Check to see if the user is running a different version of nmh
- * than they had last run, and notify them if so. But only if
- * they seem to be running an interactive program.
- * Returns 1 if they are, 0 if they are not.
+ * Compares prior version of nmh with current version. Returns 1
+ * if they compare the be the same, 0 if not.
+ *
+ * older - 0 for difference comparison, 1 for only if older