use GMT for the conditional timed gets (reported by Phil Karn)

    if(data->timecondition) {

    if(data->timecondition) {

      struct tm *thistime;

      struct tm *thistime;

      /* Phil Karn (Fri, 13 Apr 2001) pointed out that the If-Modified-Since

       * header family should have their times set in GMT as RFC2616 defines:

       * "All HTTP date/time stamps MUST be represented in Greenwich Mean Time

       * (GMT), without exception. For the purposes of HTTP, GMT is exactly

       * equal to UTC (Coordinated Universal Time)." (see page 20 of RFC2616).

       */

#ifdef HAVE_LOCALTIME_R

#ifdef HAVE_LOCALTIME_R

      /* thread-safe version */

      /* thread-safe version */

      /* We assume that the presense of localtime_r() proves the presense

         of gmtime_r() which is a bit ugly but might work */

      struct tm keeptime;

      struct tm keeptime;

      thistime = (struct tm *)localtime_r(&data->timevalue, &keeptime);

      thistime = (struct tm *)gmtime_r(&data->timevalue, &keeptime);

#else

#else

      thistime = localtime(&data->timevalue);

      thistime = gmtime(&data->timevalue);

#endif

#endif

      if(NULL == thistime) {

      if(NULL == thistime) {

        failf(data, "localtime() failed!");

        failf(data, "localtime() failed!");