As of Go 1.8, "net/http".Server provides facilities to close all
listeners, making the same facilities in server.Server redundant.
http.Server also improves upon server.Server by additionally providing a
facility to also wait for outstanding requests to complete after closing
all listeners. Leverage those facilities to give in-flight requests up
to five seconds to finish up after all containers have been shut down.
Signed-off-by: Cory Snider <csnider@mirantis.com>
5008409b5c introduced the usage of
`strings.Cut` to help parse listener addresses.
Part of that also made it error out if no addr is specified after the
protocol spec (e.g. `tcp://`).
Before the change a proto spec without an address just used the default
address for that proto.
e.g. `tcp://` would be `tcp://127.0.0.1:2375`, `unix://` would be
`unix:///var/run/docker.sock`.
Critically, socket activation (`fd://`) never has an address.
This change brings back the old behavior but keeps the usage of
`strings.Cut`.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
