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);
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);