make http usage for registry explicit

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)

Conflicts:
	daemon/config.go
	daemon/daemon.go
	graph/pull.go
	graph/push.go
	graph/tags.go
	registry/registry.go
	registry/service.go
Refactor IsSecure change

Fix issue with restoring the tag store and setting static configuration
from the daemon. i.e. the field on the TagStore struct must be made
internal or the json.Unmarshal in restore will overwrite the insecure
registries to be an empty struct.

Signed-off-by: Michael Crosby <michael@docker.com>

Conflicts:
	graph/pull.go
	graph/push.go
	graph/tags.go
Expand documentation for --insecure-registries

Signed-off-by: Michael Crosby <michael@docker.com>
Don't hard code true for auth job

Signed-off-by: Michael Crosby <michael@docker.com>

Conflicts:
	registry/service.go
Do not verify certificate when using --insecure-registry on an HTTPS registry

Signed-off-by: Tibor Vass <teabee89@gmail.com>

Conflicts:
	registry/registry.go
	registry/registry_test.go
	registry/service.go
	registry/session.go

Conflicts:
	registry/endpoint.go
	registry/registry.go
Docs edits for dropping SSLv3 and under + release notes for 1.3.1

Signed-off-by: Tibor Vass <teabee89@gmail.com>

Conflicts:
	docs/sources/index.md

Conflicts:
	docs/sources/index.md
Fix login command

Signed-off-by: Tibor Vass <teabee89@gmail.com>
Bump to version v1.3.1

Signed-off-by: Tibor Vass <teabee89@gmail.com>

Conflicts:
	VERSION
Change version to 1.3.1-dev

Signed-off-by: Tibor Vass <teabee89@gmail.com>