build: Update quic-go for Go 1.19 (#8483)

Also adds idle time and keepalive parameters because how this is
configured has changed in the new package version. The values are those
that seems like might already be default, if keep-alives were enabled,
which is not obvious from the doc comments.

Also, Go 1.19 gofmt reformatting of comments.

lib/db/backend/backend.go

@@ -72,17 +72,17 @@ type WriteTransaction interface {
 // there is an error preventing iteration, which is then returned by
 // Error(). For example:
 //
-//     it, err := db.NewPrefixIterator(nil)
-//     if err != nil {
-//         // problem preventing iteration
-//     }
-//     defer it.Release()
-//     for it.Next() {
-//         // ...
-//     }
-//     if err := it.Error(); err != nil {
-//         // there was a database problem while iterating
-//     }
+//	it, err := db.NewPrefixIterator(nil)
+//	if err != nil {
+//	    // problem preventing iteration
+//	}
+//	defer it.Release()
+//	for it.Next() {
+//	    // ...
+//	}
+//	if err := it.Error(); err != nil {
+//	    // there was a database problem while iterating
+//	}
 //
 // An iterator must be Released when no longer required. The Error method
 // can be called either before or after Release with the same results. If an