libadlin: Add recommended settings to avoid db flood

libadlin/db.go

@@ -48,6 +48,10 @@ func DBInit(dsn string) (err error) {
 		}
 	}
 
+	db.SetConnMaxLifetime(time.Minute * 5)
+	db.SetMaxOpenConns(20)
+	db.SetMaxIdleConns(10)
+
 	return
 }