If the migration contains a new remote_photo_path migrate all photos of
the old person to this path. If the person was local before, cleanup old
uploaded files of the photos.

closes #8314

That way it can be re-used when sending the AccountMigrations to other
pods again if a message for the migrated account is received.

fixes #7902
closes #8309

fixes #7960
closes #8277

Splitting stripdown and markdownify options, because the footnote option seems to let the Redcarpet::Render::StripDown function crash

closes #8268

The chat is already removed for 0.8, so there is no need to still export
this data since it can't be imported anyway.

Related to #8069

closes #8265

closes #8262

closes #8202

closes #8182

closes #8178

Due to a bug in Rails, .truncate returns a frozen string if the string actually changed, but not if there are no changes. This leads to inconsistent behaviour, and broken tests.

This was fixed upstream, see https://github.com/rails/rails/pull/36109, but the fix did not make it into 5.2.x, so we have to work around for the time being.

It doesn't add any security to have this encrypted, but it adds
complexity for podmins, because they need to backup the key.

closes #8014

closes #7932

When people only write `https://` as image URL, this would fail with
`Addressable::URI::InvalidURIError: Absolute URI missing hierarchical segment: 'https://'`.

closes #7922

Facebook removed the API and facebook integration is broken now, so lets
remove it.

closes #7874

Otherwise camo crashes with:
TypeError [ERR_UNESCAPED_CHARACTERS]: Request path contains unescaped characters

closes #7871

/ was missing in the profile entity $ref

closes #7835

LinksController redirects requests for provided diaspora:// links to
respective entities urls.

This adds a new dependency (`libidn11-dev` on debian, I'm not sure about
other distros).

This reverts commit 070e4caa.

Fixes #7695.

closes #7777

This feature only worked on the same pod and was more confusing than
useful.

closes #7718

This can be used in later diaspora versions to order the profile updates
so we don't overwrite a newer profile with older data.

This is to let the author of the post know, that this pod is interested
in updates about this post.

The sending user is only used to verify that the participation was sent
from this pod, but lets use an admin/podmin account if available.

closes #7708

fixes #7701
closes #7702

closes #7683

Fixes #7651

closes #7652

[ci skip]

closes #7646

closes #7641

closes #7639