GH-1227 Consider a node in sync when it is out of lib catchup since Savanna head is so close to lib and a node can temporarily fall back into head catchup on slight block delays.

Author: heifner

plugins/net_plugin/net_plugin.cpp

@@ -189,7 +189,7 @@ namespace eosio {
       static void send_handshakes();
       static void send_block_nack_resets();
       bool syncing_from_peer() const { return sync_state == lib_catchup; }
-      bool is_in_sync() const { return sync_state == in_sync; }
+      bool is_in_sync() const { return sync_state != lib_catchup; }
       void sync_reset_fork_db_root_num( const connection_ptr& conn, bool closing );
       void sync_timeout(const connection_ptr& c, const boost::system::error_code& ec);
       void sync_wait(const connection_ptr& c);