warning: implicit declaration of function 'conf_file_set_enable_ipv6'

config-file.c: In function 'parse_config_line':
config-file.c:184:23: warning: implicit declaration of function 'conf_file_set_enable_ipv6' [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wimplicit-function-declaration-Wimplicit-function-declaration8;;]
  184 |                 ret = conf_file_set_enable_ipv6(tokens[1], config);
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~
config-file.c: In function 'conf_file_set_socks5_user':
config-file.c:332:9: warning: '__builtin_strncpy' output truncated before terminating nul copying as many bytes from a string as its length [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wstringop-truncation-Wstringop-truncation8;;]
  332 |         strncpy(config->conf_file.socks5_username, username, strlen(username));
      |         ^
config-file.c:325:13: note: length computed here
  325 |         if (strlen(username) > sizeof(config->conf_file.socks5_username)) {
      |             ^~~~~~~~~~~~~~~~
config-file.c: In function 'conf_file_set_socks5_pass':
config-file.c:364:9: warning: '__builtin_strncpy' output truncated before terminating nul copying as many bytes from a string as its length [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wstringop-truncation-Wstringop-truncation8;;]
  364 |         strncpy(config->conf_file.socks5_password, password, strlen(password));
      |         ^
config-file.c:357:13: note: length computed here
  357 |         if (strlen(password) > sizeof(config->conf_file.socks5_password)) {
      |             ^~~~~~~~~~~~~~~~