only log errors, dial correct addresses

"this means if there are lookup errors or typos in the persistent_peers,
tendermint will fail to start ? didn't some one ask for us not to do
this previously ?"

p2p/switch.go

@@ -350,12 +350,10 @@ func (sw *Switch) IsDialing(id ID) bool {
 // DialPeersAsync dials a list of peers asynchronously in random order (optionally, making them persistent).
 func (sw *Switch) DialPeersAsync(addrBook AddrBook, peers []string, persistent bool) error {
 	netAddrs, errs := NewNetAddressStrings(peers)
+	// only log errors, dial correct addresses
 	for _, err := range errs {
 		sw.Logger.Error("Error in peer's address", "err", err)
 	}
-	if len(errs) > 0 {
-		return errors.New("Errors in peer addresses (see errors above)")
-	}
 
 	ourAddr := sw.nodeInfo.NetAddress()