-user specified, update the user's authorized_keys file in
-/var/cache/monkeysphere/USER. See `man monkeysphere' for more info.
+user specified, user ID's listed in the user's authorized_user_ids
+file are processed, and the user's authorized_keys file in
+/var/cache/monkeysphere/authorized_keys/USER. See `man monkeysphere'
+for more info. If the USER_CONTROLLED_AUTHORIZED_KEYS variable is
+set, then a user-controlled authorized_keys file (usually
+~USER/.ssh/authorized_keys) is added to the authorized_keys file. `k'
+may be used in place of `update-known_hosts'.