fix to bootstrap POA network without restart

eth/handler.go

@@ -240,7 +240,7 @@ func newHandler(config *handlerConfig) (*handler, error) {
 		// accept each others' blocks until a restart. Unfortunately we haven't figured
 		// out a way yet where nodes can decide unilaterally whether the network is new
 		// or not. This should be fixed if we figure out a solution.
-		if !h.synced.Load() {
+		if !h.synced.Load() && config.Sync != downloader.FullSync {
 			log.Warn("Syncing, discarded propagated block", "number", blocks[0].Number(), "hash", blocks[0].Hash())
 			return 0, nil
 		}