freddygv 0e5131bd33 Generate ACL token for server management
This commit introduces a new ACL token used for internal server
management purposes.

It has a few key properties:
- It has unlimited permissions.
- It is persisted through Raft as System Metadata rather than in the
ACL tokens table. This is to avoid users seeing or modifying it.
- It is re-generated on leadership establishment.
2022-09-16 17:54:34 -06:00
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