Rename and remove some token deletion config flags.
Add fields to user/token deletion observe
Rename _logoutAllOthers to logoutOtherClients
Get rid of connectionCloseDelaySecs
Make token expiration backwards compatible with numeric `when`.
Add docs for loginExpirationInDays and logoutOtherClients()
Fix logoutOtherClients docs typos
Minor token deletion cleanup and comments