Start of node compatible socket interface

[sjoerdvisscher]

This is a work in progress, but I want to merge this since the change otherwise wont survive the move to a new repo.

Pre-submit checklist:

• Branch
  • Tests are provided (if possible)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
  • Formatting, PNG optimization, etc. are updated
  • Important changes are reflected in changelog.d of the affected packages
• PR
  • Self-reviewed the diff
  • Useful pull request description
  • Reference the ADR in the PR and reference the PR in the ADR (if revelant)
  • Reviewer requested