pool: account for header download time before invoking stall behavior.

lib/net/peer.js

@@ -197,7 +197,7 @@ Peer.RESPONSE_TIMEOUT = 30000;
  * @default
  */
 
-Peer.BLOCK_TIMEOUT = 60000;
+Peer.BLOCK_TIMEOUT = 120000;
 
 /**
  * Max number of requested items.

lib/net/pool.js

@@ -1883,6 +1883,10 @@ Pool.prototype._handleHeaders = co(function* handleHeaders(peer, packet) {
     headers.length,
     peer.hostname());
 
+  // If we received a valid header
+  // chain, consider this a "block".
+  peer.blockTime = util.ms();
+
   // Request the blocks we just added.
   if (checkpoint) {
     this.headerChain.shift();