expand the audience of delete activities to all recipients of the deleted object

Closes #682

See merge request pleroma/pleroma!891

Preserves parameters in link headers

Closes #716

See merge request pleroma/pleroma!908

Merge search endpoint into /users

See merge request pleroma/pleroma!898

Plugs.HTTPSecurityPlug: Add static_url to CSP's connect-src

See merge request pleroma/pleroma!900

Web.RelMe: Fix having other values in rel attr

See merge request pleroma/pleroma!901

[#647] tests for web push

See merge request pleroma/pleroma!904

Add default config for masto_fe

See merge request pleroma/pleroma!906

Properly escape reserved URI charachters in upload urls

Closes #700

See merge request pleroma/pleroma!905

Related to: pleroma/mastofe!22

Include admins in nodeinfo

Closes #689

See merge request pleroma/pleroma!899

One example of this is Github which puts a rel="nofollow me" on the
profile link.

Closes: pleroma/pleroma!469

rich media: don't crawl bogus URIs

See merge request pleroma/pleroma!864

Add status text to notifications (mentions and reposts)

Closes #696

See merge request pleroma/pleroma!897

Stop adresssing like activities to actor's follower collection on non-public posts

See merge request pleroma/pleroma!896

Unify follow code with CommonAPI

Closes #690

See merge request pleroma/pleroma!889

Fix DM visibility for blocking users #698

Closes #698

See merge request pleroma/pleroma!890

Merge branch 'bugfix/delete-activity-audience' of git.pleroma.social:pleroma/pleroma into bugfix/delete-activity-audience