Update GPL->LGPL for tools moved from core-admin repository.
While at it, change mailing address to www link, as suggested by FSF.
Cc: @woju
Cc: @rootkovska
It doesn't make sense to send mgmt call to _named_ VM just to ask for
its name. Use value that QubesVM object already have.
This also means we can safely access vm.name, no need to touch any
private attribute.
QubesOS/qubes-issues#853
