Add Eric Windisch to MAINTAINER for tarsum

This code is vital to the security of the project and it is important
we assure it is well-maintained and guarded.

I am vested in assuring this code maintains security and
provides as much compatibility as possible between releases.

Signed-off-by: Eric Windisch <eric@windisch.us>
Cleanup: applyVolumesFrom

Docker-DCO-1.1-Signed-off-by: Brian Goff <cpuguy83@gmail.com> (github: cpuguy83)
move TestKillDifferentUser

Signed-off-by: Victor Vieux <vieux@docker.com>
move TestEntrypoint & TestBindMounts

Signed-off-by: Victor Vieux <vieux@docker.com>
remove auth_test.go

Signed-off-by: Victor Vieux <vieux@docker.com>
Update /etc/hosts when linked container is restarted

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
pkg/graphdb: tests for Parents and Children

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
pkg/networkfs/etchosts: tests for Update method

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
Update networking doc with clarified text regarding links usage

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
Merge pull request #7767 from vieux/move_some_tests

Move some tests
Merge pull request #7672 from cpuguy83/cleanup_volumes_from

Cleanup: applyVolumesFrom
Merge pull request #7677 from erikh/update_hosts_linked_containers

Update /etc/hosts when linked container is restarted
Merge pull request #7647 from ewindisch/erw-tarsum-maintainer

Add Eric Windisch to MAINTAINER for tarsum