Failed to create AutoNAT service with LIBP2P_FORCE_PNET=1

[requilence]

Version information:

0.4.19, 0.4.20 and master

Type:

bug

Description:

• EnableAutoNATService=true in the config
• LIBP2P_FORCE_PNET=1 in the env
• swarm.key is in the place

I got:

p2p-config: tried to create a libp2p node with no Private Network Protector but usage of Private Networks is forced by the enviroment
error creating online ipfs node: privnet: private network was not configured but is enforced by the environment

The reason is that we don't pass libp2p.PrivateNetwork option to the autonat.NewAutoNATService() so the check is failed in the libp2p: https://github.com/libp2p/go-libp2p/blob/master/config/config.go#L78

• As I understand we still need to pass the private network option for the autonat service(server) so only the clients from the same private network will be able to connect to it
• I made the PR but not sure if I made it right as I not familiar with the new go.uber.org/fx approach implemented after 0.4.20