(newtime): Now an array of two timespecs, one

(newtime): Now an array of two timespecs, one
for access and one for modification.
(ref_stats): Remove.
(get_reldate): Use get_date's parameter profile.
(touch, main): Adjust to above changes.
(main): Work even if tm_year == INT_MAX (so long as long int is wider).
Use gettime instead of gettimeofday, for new get_date signature.