Converts a binary timestamp to a tm structure, using the time
    differential factor (TDF) information contained in the timestamp
    to determine the TDF returned with the tm structure.

    Format

      #include <utc.h>

      int utc_anytime(timetm, *tns, *inacctm, *ins, *tdf, *utc)

         struct tm timetm;
         long *tns;
         struct tm *inacctm;
         long *ins;
         long *tdf;
         const utc_t *utc;