tiny table heading tweak for #2149 - change ID to CONTAINER ID/IMAGE ID or IMAGE (the later if it could be an ID or a repo:tag
Prevent DNS server conflicts in CreateBridgeIface

Retrieve /etc/resolv.conf data (if available)

Add checkNameserverOverlaps and call it to
make sure there are no conflicts

Add utils.GetNameserversAsCIDR and tests

Read /etc/resolv.conf and pull out nameservers,
formatting them as a CIDR block ("1.2.3.4/32")
Merge pull request #1577 from mrallen1/fix/1502

Prevent DNS server conflicts in CreateBridgeIface
Merge pull request #2334 from SvenDowideit/2149-small-cli-usability-change

change ID to CONTAINER ID/IMAGE ID