Prints configuration overview

[daniellehrner]

Signed-off-by: Daniel Lehrner [email protected]

PR description

Prints an overview of configuration and system information at startup. This is considered a first version and mainly intended to help debug issues that users on Ethereum Mainnet experience.

Documentation

• [x] I thought about documentation and added the doc-change-required label to this PR if updates are required.

Changelog

• [x] I thought about the changelog and included a changelog update if required.

[antonydenyer]

I suspect this is only really useful when reporting bugs, would it make more sense to stick it in its own subcommand?

[macfarla]

I like this idea