The ACL token state schema has been updated to utilise two new
indexes which track expiration of tokens that are configured with
an expiration TTL or time. A new state function allows listing
ACL expired tokens which will be used by internal garbage
collection.
The ACL endpoint has been modified so that all validation happens
within a single function call. This is easier to understand and
see at a glance. The ACL token validation now also includes logic
for expiry TTL and times. The ACL endpoint upsert tests have been
condensed into a single, table driven test.
There is a new token canonicalize which provides a single place
for token canonicalization, rather than logic spread in the RPC
handler.
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