message: Use steady clock for cache map
diff: #include <cstring>
  #include <cstdlib>
  #include <iomanip>
  +#include <chrono>
  using std::map;
  using std::vector;
  @@ -436,11 +437,8 @@ timeval CUtils::GetTime() {
  }
  unsigned long long CUtils::GetMillTime() {
  - struct timeval tv = GetTime();
  - unsigned long long iTime = 0;
  - iTime = (unsigned long long)tv.tv_sec * 1000;
  - iTime += ((unsigned long long)tv.tv_usec / 1000);
  - return iTime;
  + std::chrono::time_point<std::chrono::steady_clock> time = std::chrono::steady_clock::now();
  + return std::chrono::duration_cast<std::chrono::milliseconds>(time.time_since_epoch()).count();
  }
  CString CUtils::CTime(time_t t, const CString& sTimezone) {
  