* .well-known/social-relay - to serve subscription preferences to relays
* Workers.deferred_dispatch relay carbon copy functionality for outbound sending

See discussion here: https://www.loomio.org/d/9vpoe0UR/public-post-federation#comment-730911 and spec here: https://wiki.diasporafoundation.org/Relay_servers_for_public_posts

closes #6183

Better display for stream faces

this is the suggested styling according to hound/pronto/rubocop
(#6192)

instead of before blocks creating instance variables
pronto checked

#6192

(#6192)

#6192

and dipatch is also called in the following test
#6192

instead of instance variables
(#6192)

since dispatch method is not private
(#6192)

refactor test: replacing instance variables in before blocks, renaming variables for easier understanding, simplify test set up with less different comments, correct two tests

Update Changelog to improve terms changes indication.

commit_message has newlines which break the rather naive
IRC client Travis uses

One does not simply 'enter an email' (should I enter a random email from my Inbox?), instead one enters ones own email address.

closes #6191

closes #6193

Add a ToS design change mention in the changelog, close #6121

closes #6151