* ospf_lsa.h: New flag to the LSA structure for the SPF calculation.
	* ospf_lsdb.h: Export ospf_lsdb_clean_stat() function.
	* ospf_spf.h: Add link to the LSA stat structure into vertex.
	* ospf_spf.c: New functions cmp() and update_stat() to manage
	  candidates. Remove ospf_spf_has_vertex(), ospf_vertex_lookup(),
	  ospf_install_candidate() and ospf_spf_register() functions not needed
	  any more. Update ospf_vertex_new(), ospf_spf_next() and
	  ospf_spf_calculate() functions to use pqueue instead of linked list.
diff --git a/ospfd/ospf_lsdb.h b/ospfd/ospf_lsdb.h
index 8ae66a1..e192308 100644
--- a/ospfd/ospf_lsdb.h
+++ b/ospfd/ospf_lsdb.h
@@ -69,6 +69,8 @@
 void ospf_lsdb_add (struct ospf_lsdb *, struct ospf_lsa *);
 void ospf_lsdb_delete (struct ospf_lsdb *, struct ospf_lsa *);
 void ospf_lsdb_delete_all (struct ospf_lsdb *);
+/* Set all stats to -1 (LSA_SPF_NOT_EXPLORED). */
+void ospf_lsdb_clean_stat (struct ospf_lsdb *lsdb);
 struct ospf_lsa *ospf_lsdb_lookup (struct ospf_lsdb *, struct ospf_lsa *);
 struct ospf_lsa *ospf_lsdb_lookup_by_id (struct ospf_lsdb *, u_char,
 					struct in_addr, struct in_addr);