* Start work on passing context to backends
* More work on passing context
* Unindent logical system
* Unindent token store
* Unindent passthrough
* Unindent cubbyhole
* Fix tests
* use requestContext in rollback and expiration managers
* Compare groups case-insensitively at login time, since Okta groups are
case-insensitive but preserving.
* Make other group operations case-preserving but otherwise
case-insensitive. New groups will be written in lowercase.
