void ds_put_format_valist(struct ds *, const char *, va_list)
PRINTF_FORMAT(2, 0);
void ds_put_printable(struct ds *, const char *, size_t);
-void ds_put_strftime(struct ds *, const char *, const struct tm *)
+void ds_put_strftime(struct ds *, const char *, bool utc)
STRFTIME_FORMAT(2);
void ds_put_hex_dump(struct ds *ds, const void *buf_, size_t size,
uintptr_t ofs, bool ascii);