server-host=* doesn't bind to ipv6

[steve-chavez]

Problem

We document that * should bind to ipv4 and ipv6. However ipv6 doesn't work, only ipv4:

$ PGRST_SERVER_HOST='*' postgrest-with-postgresql-16 postgrest-run

$ curl localhost:3000/projects  --ipv4 -I
HTTP/1.1 200 OK

$ curl localhost:3000/projects  --ipv6 -I
curl: (7) Failed to connect to localhost port 3000 after 0 ms: Connection refused

Notes

Currently only *6 binds to ipv6 and ipv4.