Add Sockets (-H) list to `docker -D info`.
Add Sockets (-H) list to `docker -D info`.

This will allow us to _know_ what the user's -H settings are, which may
be useful for debugging later.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)

redpanda/cli,cpuguy83/cli,riyazdf/cli,Zebrilee/cli,docker/cli,docker/cli,e11137/cli,riyazdf/cli,allencloud/cli,dnephin/cli,thaJeztah/cli,ashfall/cli,ashfall/cli,Zebrilee/cli,allencloud/cli,redpanda/cli,thaJeztah/cli,cpuguy83/cli,e11137/cli,dnephin/cli