Fixes broken-pipe issue when piping s3cmd to grep -q, by removing the -q
flag and redirecting to /dev/null instead.
Add net-tools for ifconfig, because some tests rely on ifconfig.
Harmonize all Dockerfiles in this direction.
Signed-off-by: Tibor Vass <tibor@docker.com>
Upstream-commit: f27b5dda4afc0b0a278eb5379d17dfc3533c5397
Component: engine
47313c7b66