extern int git_config_bool(const char *, const char *);
extern int git_config_string(const char **, const char *, const char *);
extern int git_config_pathname(const char **, const char *, const char *);
+extern int git_config_expiry_date(timestamp_t *, const char *, const char *);
extern int git_config_set_in_file_gently(const char *, const char *, const char *);
extern void git_config_set_in_file(const char *, const char *, const char *);
extern int git_config_set_gently(const char *, const char *);