Due to known AEAD encryption deficiencies in old versions of the
kernel, we have added a section on identifying and back-porting
mesh to otherwise non-supporting platforms.
Add a tree structure to a nodes data storage, in order to safely handle
Replay Protection list, Refactor local Sequence Numbers, and add Key
storage for Config Client nodes.
Instead of keeping track of unique 16bit node identifiers, reuse their
UUIDs to create both storage directories and dbus objects.
Because of that:
- UUID is no longer stored in the JSON file, it's inferred from the
directory name instead
- Join(), CreateNetwork() and ImportLocalNode() APIs return an error if
given UUID already registered within the daemon
