Move Cura Lulzbot Edition to be based on the same generation of the
codebase as the upstream (Ultimaker) branch, away from a many-year-old
legacy tree.
Since prior Lulzbot Edition packaging simply wrapped binaries unpacked
from Debian binary packages, doing this right requires forking the same
dependencies that Lulzbot has branched themselves as well.
* treewide: http -> https sources
This updates the source urls of all top-level packages from http to
https where possible.
* buildtorrent: fix url and tab -> spaces
