+void CtdlGetRelationship(struct visit *vbuf,
+ struct ctdluser *rel_user,
+ struct ctdlroom *rel_room);
+void CtdlSetRelationship(struct visit *newvisit,
+ struct ctdluser *rel_user,
+ struct ctdlroom *rel_room);
+void CtdlMailboxName(char *buf, size_t n, const struct ctdluser *who, const char *prefix);