* perf: keep track of the ddts older than 4 weeks).
* perf: sum ddts to compute total downloads instead of LP query.
* Debug log stored into a file (ppastats.log).
* perf: keep track of the ddts older than 4 weeks).
* perf: sum ddts to compute total downloads instead of LP query.
* Debug log stored into a file (ppastats.log).