message: print block number if it's less 5 minutes old
diff: @@ -283,7 +283,7 @@ class producer_plugin_impl : public std::enable_shared_from_this<producer_plugin
  _production_enabled = true;
  - if( fc::time_point::now() - block->timestamp < fc::seconds(5) || (block->block_num() % 1000 == 0) ) {
  + if( fc::time_point::now() - block->timestamp < fc::minutes(5) || (block->block_num() % 1000 == 0) ) {
  ilog("Received block ${id}... #${n} @ ${t} signed by ${p} [trxs: ${count}, lib: ${lib}, conf: ${confs}, latency: ${latency} ms]",
  ("p",block->producer)("id",fc::variant(block->id()).as_string().substr(8,16))
  ("n",block_header::num_from_id(block->id()))("t",block->timestamp)
  