Backports for 2.1.0 beta (#9518)

* parity-version: mark 2.1.0 track beta

* ci: update branch version references

* docker: release master to latest

* Fix checkpointing when creating contract failed (#9514)

* ci: fix json docs generation (#9515)

* fix typo in version string (#9516)

* Update patricia trie to 0.2.2 crates. Default dependencies on minor
version only.

* Putting back ethereum tests to the right commit

* Enable all Constantinople hard fork changes in constantinople_test.json (#9505)

* Enable all Constantinople hard fork changes in constantinople_test.json

* Address grumbles

* Remove EIP-210 activation

* 8m -> 5m

* Temporarily add back eip210 transition so we can get test passed

* Add eip210_test and remove eip210 transition from const_test

* In create memory calculation is the same for create2 because the additional parameter was popped before. (#9522)

* deps: bump fs-swap and kvdb-rocksdb

* Multithreaded snapshot creation (#9239)

* Add Progress to Snapshot Secondary chunks creation

* Use half of CPUs to multithread snapshot creation

* Use env var to define number of threads

* info to debug logs

* Add Snapshot threads as CLI option

* Randomize chunks per thread

* Remove randomness, add debugging

* Add warning

* Add tracing

* Use parity-common fix seek branch

* Fix log

* Fix tests

* Fix tests

* PR Grumbles

* PR Grumble II

* Update Cargo.lock

* PR Grumbles

* Default snapshot threads to half number of CPUs

* Fix default snapshot threads // min 1

* correct before_script for nightly build versions (#9543)

- fix gitlab array of strings syntax error
- get proper commit id
- avoid colon in stings

* Remove initial token for WS. (#9545)

* version: mark release critical

* ci: fix rpc docs generation 2 (#9550)

* Improve P2P discovery (#9526)

* Add `target` to Rust traces

* network-devp2p: Don't remove discovery peer in main sync

* network-p2p: Refresh discovery more often

* Update Peer discovery protocol

* Run discovery more often when not enough nodes connected

* Start the first discovery early

* Update fast discovery rate

* Fix tests

* Fix `ping` tests

* Fixing remote Node address ; adding PingPong round

* Fix tests: update new +1 PingPong round

* Increase slow Discovery rate
Check in flight FindNode before pings

* Add `deprecated` to deprecated_echo_hash

* Refactor `discovery_round` branching

* net_version caches network_id to avoid redundant aquire of sync read lock (#9544)

* net_version caches network_id to avoid redundant aquire of sync read lock, #8746

* use lower_hex display formatting for net_peerCount rpc method

* Increase Gas-floor-target and Gas Cap (#9564)

+ Gas-floor-target increased to 8M by default

+ Gas-cap increased to 10M by default

* Revert to old parity-tokio-ipc.

* Downgrade named pipes.

util/network-devp2p/src/node_table.rs

@@ -385,7 +385,7 @@ impl NodeTable {
 			None => return,
 		};
 		if let Err(e) = fs::create_dir_all(&path) {
-			warn!("Error creating node table directory: {:?}", e);
+			warn!(target: "network", "Error creating node table directory: {:?}", e);
 			return;
 		}
 		path.push(NODES_FILE);
@@ -400,11 +400,11 @@ impl NodeTable {
 		match fs::File::create(&path) {
 			Ok(file) => {
 				if let Err(e) = serde_json::to_writer_pretty(file, &table) {
-					warn!("Error writing node table file: {:?}", e);
+					warn!(target: "network", "Error writing node table file: {:?}", e);
 				}
 			},
 			Err(e) => {
-				warn!("Error creating node table file: {:?}", e);
+				warn!(target: "network", "Error creating node table file: {:?}", e);
 			}
 		}
 	}
@@ -418,7 +418,7 @@ impl NodeTable {
 		let file = match fs::File::open(&path) {
 			Ok(file) => file,
 			Err(e) => {
-				debug!("Error opening node table file: {:?}", e);
+				debug!(target: "network", "Error opening node table file: {:?}", e);
 				return Default::default();
 			},
 		};
@@ -431,7 +431,7 @@ impl NodeTable {
 					.collect()
 			},
 			Err(e) => {
-				warn!("Error reading node table file: {:?}", e);
+				warn!(target: "network", "Error reading node table file: {:?}", e);
 				Default::default()
 			},
 		}