+
+int IsDirectory(char *addr, int allow_masq_domains);
+void CtdlDirectoryInit(void);
+int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr);
+int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr);
+int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen);