8.2
Remove remaining experimental classes
Declare new parameters on interfaces and methods explicitly
Merge branch '6.4' into 7.3
[Security] add return types
[Security][Ldap] Remove deprecated `eraseCredentials()` from (User|Token)Interface
CS fixes
[Security] Decouple passwords from UserInterface
[Security] fix small typo in PasswordAuthenticatedUserInterface
Improve documentation of PasswordUpgraderInterface
Merge branch '6.4' into 7.0