Process unresponsive to SIGINT

[btwiuse]

This bug was discovered on the master branch after the merge at 9d149fa3cbba11f2985fbc8e42cd2cf6b9a679f7

Using ./examples/echo to reproduce, first set libp2p to the problematic version, the process can't be killed with ctrl-c

[root@railway echo]# go get github.com/libp2p/go-libp2p@9d149fa3cbba11f2985fbc8e42cd2cf6b9a679f7 
go: upgraded github.com/libp2p/go-libp2p v0.33.1-0.20240321170946-39242a499ce6 => v0.33.1-0.20240321171834-9d149fa3cbba
[root@railway echo]# go run . -l 1234
2024/05/06 21:56:06 I am /ip4/127.0.0.1/tcp/1234/p2p/QmRvs2Uj3rkx9RUbawDPSTDkM6og4C4A4RtB15xdXjwSB9
2024/05/06 21:56:06 listening for connections
2024/05/06 21:56:06 Now run "./echo -l 1235 -d /ip4/127.0.0.1/tcp/1234/p2p/QmRvs2Uj3rkx9RUbawDPSTDkM6og4C4A4RtB15xdXjwSB9" on a different terminal
^C^C^C

Now downgrade libp2p to its parent commit, the process gets interrupted as expected

[root@railway echo]# go get github.com/libp2p/go-libp2p@39242a499ce6fcd64dd414b504f538ab329b87fc
go: downgraded github.com/libp2p/go-libp2p v0.33.1-0.20240321171834-9d149fa3cbba => v0.33.1-0.20240321170946-39242a499ce6
[root@railway echo]# go run . -l 1234
2024/05/06 22:02:58 I am /ip4/127.0.0.1/tcp/1234/p2p/QmZELJtUuWc255ytkFrPHSqEfpGJyJxZVswLRa2aEPVcoW
2024/05/06 22:02:58 listening for connections
2024/05/06 22:02:58 Now run "./echo -l 1235 -d /ip4/127.0.0.1/tcp/1234/p2p/QmZELJtUuWc255ytkFrPHSqEfpGJyJxZVswLRa2aEPVcoW" on a different terminal
^Csignal: interrupt

[MarcoPolo]

This issue is that uber fx (a dependency we have to construct the host) will register their own signal handler even if we stop the host.

We should be able to fix this once this issue is resolved: uber-go/fx#1197

As a workaround your program can listen for sigint.