Proton Drive Linux sync (source code)

= Proton Drive Linux sync

Apparently there's not built-in mechanism to delete remote files that were deleted locally....
* https://www.reddit.com/r/ProtonDrive/comments/1utymff/question_proton_drive_cli_on_linux_how_to/
* https://www.reddit.com/r/ProtonMail/comments/1dq2zek/is_there_a_way_to_sync_proton_drive_to_disk_on/