extern bool read_config_file(avl_tree_t *, const char *);
extern bool read_server_config(void);
extern FILE *ask_and_open(const char *, const char *);
extern bool read_config_file(avl_tree_t *, const char *);
extern bool read_server_config(void);
extern FILE *ask_and_open(const char *, const char *);