core: log variant properties in connection diff
Properly print properties containing a GVariant (as those backed by a gendata hashtable).
For example, before:
++ ethtool.ring-rx-mini = ???
After:
++ ethtool.ring-rx-mini = 0
Properly print properties containing a GVariant (as those backed by a gendata hashtable).
For example, before:
++ ethtool.ring-rx-mini = ???
After:
++ ethtool.ring-rx-mini = 0