+/* --- @localprobe@ --- *
+ *
+ * Arguments: @int cdb@ = the CDB file descriptor
+ * @const char *sender@ = the envelope-sender address
+ * @const char *key, int len@ = the (possibly defaulted) mailbox
+ * name to look up
+ * @const char *suffix@ = a suffix to append to the key (e.g.,
+ * @"-default"@)
+ * @const char *tail@ = the tail of the local address matching
+ * any defaulted extension part
+ * @int *rc@ = where to put the answer
+ *
+ * Returns: Positive if found, zero if not found, negative on error.
+ *
+ * Use: Looks up a local-part in the database. This may involve
+ * invoking a Userv service for the recipient's owner.
+ */
+