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