Speed up loading ACLs on startup #98

Job	Run time
Linting	1m 49s
Unit tests	2m 9s
Build for Windows (windows, amd64)	1m 13s
Build for Linux (linux, amd64)	42s
Build for Linux (linux, 386)	53s
WASM build test	0s
Initial tests passed	2s
Upgrade tests from HEAD-2	7m 13s
Sytest (SQLite native)	4m 41s
Sytest (SQLite Cgo)	5m 7s
Integration tests	4m 23s
Complement (SQLite native)	3m 59s
Sytest (PostgreSQL)	6m 2s
Complement (SQLite Cgo)	4m 22s
Complement (PostgreSQL)	9m 1s
Upgrade tests	7m 21s
Integration tests passed	2s
Update Docker images	0s
	58m 59s

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