use goroutines to copy the data from the stream to the TCP
connection, and viceversa, removing the socat dependency.
Quoting Lantao Liu, the logic is as follow:
When one side (either pod side or user side) of portforward
is closed, we should stop port forwarding.
When one side is closed, the io.Copy use that side as source will close,
but the io.Copy use that side as dest won't.
Signed-off-by: Antonio Ojea <antonio.ojea.garcia@gmail.com>
As of opencontainers/runc@db093f6 runc no longer depends on libapparmor
thus libapparmor-dev no longer needs to be installed to build it or
anythind that depends on it (like containerd or cri-containerd). Adjust
the documentation accordingly.
containerd/containerd#2238 did the same for containerd.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
