vouch#62 vouch#61 make auth_url check provider aware

vouch#61 add oauth config to BasicTest

vouch#42 improve `vouch.domains` explanation

improve session key handling

Merge branch 'halkeye-fix-static'

vouch#54 improve secret origin and validate length

Merge branch 'halkeye-k8s-support'

notice: name has been changed to vouch/vouch-proxy

Merge branch 'halkeye-fix-multiple-accounts'

Merge branch 'halkeye-smaller-docker-image'