prop140: Caches serve diffs on request

When a client asks for it, caches should serve consensus diffs.

We'll want to integrate this with the new compression logic that ahf is proposing.

changed milestone to %Tor: 0.3.1.x-final

added actualpoints::1 component::core tor/tor milestone::Tor: 0.3.1.x-final owner::nickm parent::13339 points::2 priority::medium prop140 resolution::implemented severity::normal sponsor::4 status::closed type::enhancement labels

Trac:
Keywords: N/A deleted, prop140 added

Trac:
Status: new to assigned
Owner: N/A to nickm

I've done some preliminary work in my branch cce_spooling, which is not yet ready for review.

Trac:
Cc: N/A to ahf

My current branch serve_diffs is ready for review. Also, it needs tests, but I'm not quite sure how to write those yet. Suggestions would be great.

ahf: this may step on your feet slightly for #21667 (moved) stuff?

Trac:
Status: assigned to needs_review

Trac:
Actualpoints: N/A to 1

I now have this done in my prop140_complete branch, but it will need to be rebased or changed once #22143 (moved) is done.

Trac:
Status: needs_review to closed
Resolution: N/A to implemented

closed

changed time estimate to 16h

added 8h of time spent

moved to tpo/core/tor#21649 (closed)