Tahoe-LAFS issues

[jonaysanz]

Solve all tahoe-lafs related issues linked in
https://www.cageos.org/index.php?page=apps&section=DecentralizedBackup

[jonaysanz]

https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2423
https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2422
https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2424
https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2425
https://www.cageos.org/index.php?page=apps&section=DecentralizedBackup