Genesis fix (#835)

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

docs/Tutorials/Create-Private-Clique-Network.md

@@ -101,6 +101,7 @@ Copy the following genesis definition to a file called `cliqueGenesis.json` and
 {
   "config":{
     "chainId":1981,
+    "constantinoplefixblock": 0,
     "clique":{
       "blockperiodseconds":15,
       "epochlength":30000
@@ -258,4 +259,4 @@ Import accounts to MetaMask and send transactions as described in the [Private N
 When finished using the private network, stop all nodes using ++ctrl+c++ in each terminal window. 
 
 !!!tip
-    To restart the Clique network in the future, start from [6. Start First Node as Bootnode](#6-start-first-node-as-bootnode). 
+    To restart the Clique network in the future, start from [6. Start First Node as Bootnode](#6-start-first-node-as-bootnode). 

docs/Tutorials/Create-Private-Network.md

@@ -57,6 +57,7 @@ Copy the following genesis definition to a file called `privateNetworkGenesis.js
 ```json
 {
   "config": {
+      "constantinoplefixblock": 0,
       "ethash": {
         "fixeddifficulty": 1000
       },
@@ -209,4 +210,4 @@ Start a node with the [`--rpc-ws-enabled`](../Reference/Pantheon-CLI-Syntax.md#r
 When finished using the private network, stop all nodes using ++ctrl+c++ in each terminal window. 
 
 !!!tip
-    To restart the private network in the future, start from [4. Restart First Node as Bootnode](#4-restart-first-node-as-bootnode). 
+    To restart the private network in the future, start from [4. Restart First Node as Bootnode](#4-restart-first-node-as-bootnode).