2.3.9 stable backports (#10532)

* version: bump stable

* fix Sha3/keccak256 hash calculation for binaries (#10509)

https://github.com/paritytech/parity-ethereum/issues/10495

* verbose flag for cpp tests (#10524)

* Initial support sccache for windows build (#10520)

* Initial support sccache for win build

* show sccache stats

* cache paths for shared runners

* sccache status is in the script.

* removed windows test for now

* ethcore: remove eth social and easthub chain configs (#10531)

* Fix max_gas (#10537)

Fix max_gas

* build android with cache, win fixes (#10546)

* build android with cache!

* windows fixes

* windows fixes 2

* windows fixes 3

* windows fixes 4

* windows should have sccache variables in env variables

* Update light client harcoded headers (#10547)

* kovan #10643457

* ropsten #5296129

* foundation #7460865

* classic #7747585

* indentation

* morden #3973121

parity/cli/mod.rs

@@ -288,7 +288,7 @@ usage! {
 
 			ARG arg_chain: (String) = "foundation", or |c: &Config| c.parity.as_ref()?.chain.clone(),
 			"--chain=[CHAIN]",
-			"Specify the blockchain type. CHAIN may be either a JSON chain specification file or ethereum, classic, poacore, tobalaba, expanse, musicoin, ellaism, easthub, social, mix, callisto, morden, ropsten, kovan, poasokol, testnet, or dev.",
+			"Specify the blockchain type. CHAIN may be either a JSON chain specification file or ethereum, classic, poacore, tobalaba, expanse, musicoin, ellaism, mix, callisto, morden, ropsten, kovan, poasokol, testnet, or dev.",
 
 			ARG arg_keys_path: (String) = "$BASE/keys", or |c: &Config| c.parity.as_ref()?.keys_path.clone(),
 			"--keys-path=[PATH]",
@@ -2131,3 +2131,4 @@ mod tests {
 		Args::parse(&["parity", "--max-peers=100", "--min-peers=40"]).unwrap();
 	}
 }
+