-void ds_put_strftime(struct ds *, const char *template, time_t when, bool utc)
- STRFTIME_FORMAT(2);
-char *xastrftime(const char *template, time_t when, bool utc)
- STRFTIME_FORMAT(1);
+void ds_put_strftime_msec(struct ds *, const char *template, long long int when,
+ bool utc);
+char *xastrftime_msec(const char *template, long long int when, bool utc);