Remove pg_authid's TOAST table.
pg_authid's only varlena column is rolpassword, which unfortunately
cannot be de-TOASTed during authentication because we haven't
selected a database yet and cannot read pg_class. By removing
pg_authid's TOAST table, attempts to set password hashes that
require out
Increase the number of fast-path lock slots
Replace the fixed-size array of fast-path locks with arrays, sized on
startup based on max_locks_per_transaction. This allows using fast-path
locking for workloads that need more locks.
The fast-path locking introduced in 9.2 allowed each backend to acq
Refactor handling of nbtree array redundancies.
Teach _bt_preprocess_array_keys to eliminate redundant array equality
scan keys directly, rather than just marking them as redundant. Its
_bt_preprocess_keys caller is no longer required to ignore input scan
keys that were marked redundant in this w
