extern bool connect_tincd(bool verbose);
extern bool sendline(int fd, char *format, ...);
extern bool recvline(int fd, char *line, size_t len);
-extern int check_port(char *name);
+extern int check_port(const char *name);
extern FILE *fopenmask(const char *filename, const char *mode, mode_t perms);
extern ecdsa_t *get_pubkey(FILE *f);