Check if/how we should use NetworkManager's new MAC address spoofing capabilities

As https://blogs.gnome.org/lkundrak/2016/01/18/networkmanger-and-tracking-protection-in-wi-fi-networks/ sums up, NM 1.2 + wpasupplicant 2.3 allow (opt-in) to randomize MAC address used for scanning for Wi-Fi networks (that we’ve rejected in #7380 (closed)), and also to spoof the MAC address used for connecting to all Wi-Fi networks (needs to be verified, the blog post is unclear; previous NM versions allowed to configure a spoofed MAC address per network). NM 1.4 improves this further (announce blog post, NEWS entry.

Does this work on all hardware? The code suggests that this might rely on per-device capabilities.

What shall we do about it?

Feature Branch: wip/feature/11293-network-manager-spoof-mac

Related issues

• Related to #6453
• Related to #11856 (closed)
• Related to #11931 (closed)
• Related to #10491
• Related to #17115
• Related to #17128
• Blocked by #10289 (closed)

Original created by @intrigeri on 11293 (Redmine)