PoS validator metadata

[tzemanovic]

allow validators to optionally set metadata such as an alias, website, description

[tzemanovic]

let's also add email and discord handle which could be used for e.g. testnet coordination

[brentstone]

From brief brainstorming with @Fraccaman: perhaps a general change_validator_metadata transaction will also be implemented that will replace / absorb change_validator_commission, with commission and alias, website, description, email, discord, etc among the data that can be changed at once

[brentstone]

Should the pieces of data mentioned in the convo here be optional data in a GenesisValidator too?

[tzemanovic]

Should the pieces of data mentioned in the convo here be optional data in a GenesisValidator too?

I think so