Bugfix mandatory 0.9.18

Heatledger 0.9.18

Mandatory update will do a hard fork at 105,000.

This release fixes several bugs and disables miner rewards at the fork height.

In order to provide a better download experience when downloading the blockchain you will only
download from the default wellknown peers, this way preventing you from ending on a fork again.
Once the chain is downloaded in full you will connect to all peers on the network.