GitLab

fixes https://github.com/ipfs/go-ipfs/issues/6922

We should do this from
go-tcp-transport (https://github.com/libp2p/go-tcp-transport/pull/36), not here,
as setting linger to 0 will cause us to send RST packets instead of nicely
closing connections.

Also, document why we need the fallback dialer.

No longer implicitly provided by go-reuseport's Dialer as it was removed.

indirectly addresses:

https://github.com/libp2p/go-reuseport-transport/issues/1#issuecomment-376625179

There's no reason a consumer of this package would use this error as *we* retry
internally. Exporting it will just confuse users.