void deallocate_user_data(struct CitContext *con);
void *CtdlGetUserData(unsigned long requested_sym);
void CtdlAllocUserData(unsigned long requested_sym, size_t num_bytes);
+void CtdlReallocUserData(unsigned long requested_sym, size_t num_bytes);
int CtdlGetDynamicSymbol(void);
void enter_housekeeping_cmd(char *);
void do_command_loop(void);