V2.5.6 stable (#10961)

-  Fix cargo audit (#10921)
  - Add support for Energy Web Foundation's new chains (#10957)
  - Kaspersky AV whitelisting (#10919)
  - Avast whitelist script (#10900)
  - Docker images renaming (#10863)
  - Remove excessive warning (#10831)
  - Allow --nat extip:your.host.here.org (#10830)
  - When updating the client or when called from RPC, sleep should mean sleep (#10814)
  - added new ropsten-bootnode and removed old one (#10794)
  - ethkey no longer uses byteorder (#10786)
  - Do not drop the peer with None difficulty (#10772)
  - docs: Update Readme with TOC, Contributor Guideline. Update Cargo package descriptions (#10652)

ethcore/src/client/client.rs

@@ -1109,7 +1109,7 @@ impl Client {
 				let mut ss = self.sleep_state.lock();
 				if let Some(t) = ss.last_activity {
 					if Instant::now() > t + timeout {
-						self.sleep();
+						self.sleep(false);
 						ss.last_activity = None;
 					}
 				}
@@ -1119,7 +1119,7 @@ impl Client {
 				let now = Instant::now();
 				if let Some(t) = ss.last_activity {
 					if now > t + timeout {
-						self.sleep();
+						self.sleep(false);
 						ss.last_activity = None;
 						ss.last_autosleep = Some(now);
 					}
@@ -1218,10 +1218,10 @@ impl Client {
 		}
 	}
 
-	fn sleep(&self) {
+	fn sleep(&self, force: bool) {
 		if self.liveness.load(AtomicOrdering::Relaxed) {
 			// only sleep if the import queue is mostly empty.
-			if self.queue_info().total_queue_size() <= MAX_QUEUE_SIZE_TO_SLEEP_ON {
+			if force || (self.queue_info().total_queue_size() <= MAX_QUEUE_SIZE_TO_SLEEP_ON) {
 				self.liveness.store(false, AtomicOrdering::Relaxed);
 				self.notify(|n| n.stop());
 				info!(target: "mode", "sleep: Sleeping.");
@@ -1730,7 +1730,7 @@ impl BlockChainClient for Client {
 		}
 		match new_mode {
 			Mode::Active => self.wake_up(),
-			Mode::Off => self.sleep(),
+			Mode::Off => self.sleep(true),
 			_ => {(*self.sleep_state.lock()).last_activity = Some(Instant::now()); }
 		}
 	}