This introduces an in-process cache (using a HashBagOStuff) for session
data, and only saves to the external cache when the session is
persisted.
Bug: T125267
Change-Id: Ie161e0f7522cd68515b060ad8cf8c151b7198b0b
This also adds code to User to allow SessionProviders to apply the grant
restrictions without needing to hook UserGetRights.
Change-Id: Ida2b686157aab7c8240d6a7a5a5046374ef86d52
SessionManager is a general-purpose session management framework, rather
than the cookie-based sessions that PHP wants to provide us.
While fallback is provided for using $_SESSION and other PHP session
management functions, they should be avoided in favor of using
SessionManager directly.
For proof-of-concept extensions, see OAuth change Ib40b221 and
CentralAuth change I27ccabdb.
Bug: T111296
Change-Id: Ic1ffea74f3ccc8f93c8a23b795ecab6f06abca72
