Feature Request

During experimentation it may be useful to disable peer discovery on the whole setup and only connect to peers specified in the config.toml

Summary

Allow disabling the PEX reactor in the manifests.

Problem Definition

When experimenting, restarting leads to a different overlay network being set every time, casting doubt on comparison results.

Proposal

Allow disabling the PEX on manifests so that connections are only stablished to the peers specified in generated config.toml