Class timeval

cvmfs/util/algorithm.cc:30–30

double DiffTimeSeconds(struct timeval start, struct timeval end) {
  // Time subtraction, from GCC documentation
  if (end.tv_usec < start.tv_usec) {
    const int64_t nsec = (end.tv_usec - start.tv_usec) / 1000000 + 1;