Neutron repository has the networking guide in admin/,
so we cannot just import the admin guide contents into admin/
as it potentially breaks the existing document structure of
the networking guide. This commit imports the admin guide
into admin/archives directory so that the team can migrate them
into the networking guide after careful reviews.
Co-Authored-By: Akihiro Motoki <amotoki@gmail.com>
Change-Id: I1f99f225a6f58654911ed827f51d3d4de67f405d