Merged with master

Removed empty line

Minor improvement to jitter test

Fixed atrocious typo

Added telemetry_extra field in the speedtest settings. This can be us…

…ed to pass data from the frontend to the worker that you want to be stored in the database

Updated doc.md

Updated doc.md

removed .idea

Introduced fix for broken upload test in Chromium-based mobile browse…

…rs (since version 65)

getIP.php can now estimate distance between client and server (defaul…

…t enabled, km)