Limit database connection only to users known to that database#282

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smurthys wants to merge 3 commits intodevfrom

limit-db-connect

Commits on Aug 12, 2019

Clarify comment on granting login privilege
Sean Murthy
committed
Permit and revoke db connection at role create and revoke
Sean Murthy
committed
Remove automatic db connection to classdb group roles
Sean Murthy
committed