backports for 2.3.0 beta (#10164)

* version: mark 2.3 track beta

* version: mark update critical on all networks

* Ping nodes from discovery (#10167)

* Fix _cannot recursively call into `Core`_ issue (#10144)

* Change igd to github:maufl/rust-igd

* Run `igd::search_gateway_from_timeout` from own thread

* Handle the case for contract creation on an empty but exist account with storage items (#10065)

* Add is_base_storage_root_unchanged

* Fix compile, use a shortcut for check, and remove ignored tests

* Add a warn!

* Update ethereum/tests to v6.0.0-beta.2

* grumble: use {:#x} instead of 0x{:x}

Co-Authored-By: sorpaas <accounts@that.world>

* version: bump fork blocks for kovan and foundation (#10186)

* pull constantinople on ethereum network (#10189)

* ethcore: pull constantinople on ethereum network

* version: mark update as critical

* ethcore: remove constantinople alltogether from chain spec

* version: revert fork block for ethereum

ethcore/src/externalities.rs

@@ -116,7 +116,12 @@ impl<'a, T: 'a, V: 'a, B: 'a> Ext for Externalities<'a, T, V, B>
 	where T: Tracer, V: VMTracer, B: StateBackend
 {
 	fn initial_storage_at(&self, key: &H256) -> vm::Result<H256> {
-		self.state.checkpoint_storage_at(0, &self.origin_info.address, key).map(|v| v.unwrap_or(H256::zero())).map_err(Into::into)
+		if self.state.is_base_storage_root_unchanged(&self.origin_info.address)? {
+			self.state.checkpoint_storage_at(0, &self.origin_info.address, key).map(|v| v.unwrap_or(H256::zero())).map_err(Into::into)
+		} else {
+			warn!(target: "externalities", "Detected existing account {:#x} where a forced contract creation happened.", self.origin_info.address);
+			Ok(H256::zero())
+		}
 	}
 
 	fn storage_at(&self, key: &H256) -> vm::Result<H256> {