Plugins! (#420)

* Some queries

* Plugins!!

* cleanup

* actual names

* the actual plugins

* comment

* fix tests

* Tests

* unused errors

* Increase reaper rate to actually enforce settings

* ok

src/lib.rs

@@ -1,4 +1,6 @@
+pub mod admin;
 pub mod auth_passthrough;
+pub mod client;
 pub mod config;
 pub mod constants;
 pub mod dns_cache;
@@ -6,7 +8,10 @@ pub mod errors;
 pub mod messages;
 pub mod mirrors;
 pub mod multi_logger;
+pub mod plugins;
 pub mod pool;
+pub mod prometheus;
+pub mod query_router;
 pub mod scram;
 pub mod server;
 pub mod sharding;