Converts a tm structure and TDF (expressing the time in an
    arbitrary time zone) to a binary timestamp.

    Format

      #include <utc.h>

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

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