Support Protocol Upgrades

[HDauven]

Summary

To ensure that the network can be changed in the future and as support for governance voting, we need to support protocol upgrades. This feature will enable the network to be upgradable and pave the way for protocol upgrade voting.

Possible solution design or implementation

What needs to be done:

1. Formalize an upgrade process: Develop a process for proposing, scrutinizing and approving changes to the protocol. Discussions are on-going here.
2. Stakeholder approval mechanism: Implement a mechanism to seek and verify approval from stakeholders for proposed upgrades.
3. Upgrade handling: Implement a mechanism to propagate upgrades once they've been approved.

[HDauven]

Related DIP can be found here: dusk-network/dips#6