Fasttrack

Created by: fhdk

An experimental --fasttrack n argument

The idea is to quickly generate a short list of mirrors for use with installers.

The the run_fast_track(n) function does

• decending sort on branches
• ascending sort on last_sync
• does a range(n) loop
• probe url
• save response time
• sort the resulting list by response time
• writes list

It guarantees mirror list of fast and responsive and updated mirrors