Change allowed_hosts to known_hosts

Known hosts is a more familiar concept than allowed hosts for similar functionality.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Fix auth flag initialization

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Add deprecation warning to old tls flags

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Add auth flag to man page

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
Disable auth CLI tests on Drone

They're failing for the same reason as 07cedaab8640a68c480cb90722cb08fcf0a2c043

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Add integration tests for identity auth

Signed-off-by: Ben Firshman <ben@firshman.co.uk>