Cleanup go.mod, document things better

driver/redis/redis.go

@@ -7,10 +7,10 @@ import (
 )
 
 type Options struct {
-	Encoder  encoder.Encoder `query:"encoder" default:"msgpack"`
+	Encoder  encoder.Encoder `default:"msgpack"`
 	Address  string          `default:"127.0.0.1"`
-	DB       int             `default:"0" query:"db"`
-	Password string          `query:"password"`
+	DB       int             `default:"0"`
+	Password string
 }
 
 type Cache struct {