Add mining and custom datadir methods

Testnet.md

@@ -14,7 +14,8 @@ How is running the Testnet different to running a Mainnet node?
 --------------
 
 In essence their is very little difference in running a Testnet to a Mainnet node
-it only requires one of two possible changes in how you start the node.
+it only requires one of many possible changes in how you start the node - we will
+look at just a few.
 
 However - it is important that before you choose which method to use, you consider
 if you will be ONLY running a Testnet node, or if you will be running one alongside
@@ -30,6 +31,9 @@ Start the Testnet:
 ```
 ./src/hushd -testnet
 ```
+This will give you a running node on testnet - and your node will verify testnet
+transactions
+
 ### To run a Testnet node on it's own every time Hush is started.
 For this we need to edit the hush.conf configuration file.
 
@@ -37,12 +41,50 @@ Using your favourite text editor add the following line to the hush.conf file:
 ```
 testnet=1
 ```
+Exit your text editor and start the node with:
+```
+./src/hushd
+```
+as usual. Your node will start on the Testnet and be validating Testnet transactions
+
+### I want to run the Testnet AND mine some Testnet coins!
+Thats great!! and you will be helping to keep the testnet alive and well - and supporting
+all the testing that developers are trying out out on the chain.
+
+But please remember - this is not competitive mining, we don't need a rig full of GPU's
+running to keep the Testnet generating blocks and coins - just one CPU core will do!
+Keeping the hasrate low will ensure that everybody can mine a few blocks and do some testing.
+
+Please also note - many VPS suppliers don't like users pegging a CPU core at 100% permanently
+you may want to run this from home in a VM or on a server you own.
+
+This time we will make some more detailed changes to the hush.conf file (these will need
+removing before using this datadir for a Mainnet node)
+
+Using your favourite text editor add the following lines to the hush.conf file:
+```
+testnet=1
+gen=1
+genproclimit=1
+equihashsolver=tromp
+mineraddress=
+```
+Don't forget to add in one of your testnet transparent addresses (an empty one)
+on the last line there - it will keep all your mined coins on one address ready for
+shielding.
 
 ### What if I want to run Mainnet and Testnet at the same time?
+Not recommended - but if you must.
+
+The simple way is to use a common hush.conf file and data directory - but then you
+can't mine as you can't tell one to mine and one not to mine using the same config
+But you will still need to talk to both nodes.
+
 This is slightly more complex - as you will need to tell the client (hush-cli) which
 node you want to talk to when you ask it questions.
 
 By default hush-cli will talk to the Mainnet node if one / both are running
+
 By default hush-cli will talk to the Testnet node if ONLY the testnet is running
 
 First start the Mainnet:
@@ -63,6 +105,40 @@ hush-cli -rpcport=18822 getinfo
 ```
 this should show the Testnet node details and Testnet should be listed.
 
+### I REALLY want to run Testnet and Mainnet AND mine on the Testnet
+OK - Then I assume you know what you are doing on Linux, some basic
+commands and how to troubleshoot when things go wrong.
+
+For this, no changes to the Mainnet hush.conf are needed - they can all be removed
+and put back to default.
+
+- Copy your ```/.hush``` data directory to ```/.hush-t``` or a suitably named alternative
+- Make the changes to the new ```/.hush-t/hush.conf``` file as before:
+```
+testnet=1
+gen=1
+genproclimit=1
+equihashsolver=tromp
+mineraddress=
+```
+- Run this from the usual hush directory (adjust for your paths):
+```
+./src/hushd -datadir=/home/username/.hush-t
+```
+- OR make a nice bash script in ```/usr/bin/```
+```
+#!/bin/bash
+~/hush/src/hushd -datadir=/home/username/.hush-t $1 $2 $3
+```
+Remember that to talk to this Testnet node - you will still need to use the
+```./src/hush-cli -rpcport=18822``` style command, or of course you could also
+make other scripts and nice bits to customise the system the way you want it.
+Or use any combination of the methods outlined above.
+
+Happy hashing!
+
+### 
+
 Building
 --------
 Building a Testnet node is no different from building a mainnet node - it