Usernames with dots in them do not work with routes, because the dot usually separates the desired page format (e.g. json). I don't want to mess with changing route constraints for this patch release.

Fixes CVE-2018-8048 and CVE-2018-3740, two medium-severity XSS
vulnerabilities present in these gems when built against
libxml2 >= 2.9.2.

* Permit dots in usernames with conditions

- Dot cannot be the start or end of username
- a.lice and al.ice are considered the same during sign-up

* Fix regex mixin flags

Fix #6816, fix #6790

[Glitch] Cancel outdated pending compose suggestions

See also: #6837, #6667

Port 08f49bdb0d to the glitch flavour

* request: in the event of failure, try other IPs (#6761)

In the case where a name has multiple A/AAAA records, we should
try subsequent records instead of immediately failing when we have a
failure on the first IP address.

This significantly improves delivery success when there are network
connectivity problems affecting only IPv4 or IPv6.

* fix method call style

* request_spec: adjust test case to use Addrinfo

* request: Request/open: move private addr check to within begin/rescue

* request_spec: add case to test failover, fix exception check

* Double Addrinfo.foreach so that it correctly yields instances

fix compressed notifications again (#393)

Up until now, the order seemed to be in the *opposite* order,
which caused the WebUI to populate mentions in reversed order
when replying to toots local to one's instance.

* update to new version of devise_pam_authenticatable2

* fix behaviour if suffix is nil, fix environment loading, fix user email creation

* code cleanup/fix linter warning

In Devise::Mailer#email_changed, the new email might be in the email attr.
See: https://github.com/plataformatec/devise/blob/master/app/views/devise/mailer/email_changed.html.erb

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/pt_BR/

* Translated using Weblate (Spanish)

Currently translated at 99.6% (579 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/es/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (58 of 58 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/es/

* Translated using Weblate (Japanese)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ja/

* Translated using Weblate (French)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fr/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (58 of 58 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/es/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/es/

* Translated using Weblate (Indonesian)

Currently translated at 94.6% (71 of 75 strings)

Translation: Mastodon/Doorkeeper
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/doorkeeper/id/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Arabic)

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/ar/

* Translated using Weblate (Indonesian)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/id/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Arabic)

Currently translated at 75.5% (439 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Arabic)

Currently translated at 76.2% (443 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Russian)

Currently translated at 95.8% (557 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ru/

* Translated using Weblate (Finnish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fi/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sk/

* Translated using Weblate (Slovak)

Currently translated at 91.7% (533 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/sk/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/nl/

* Translated using Weblate (Spanish)

Currently translated at 99.8% (580 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/es/

* Translated using Weblate (Finnish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/fi/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sk/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/es/

* Translated using Weblate (Swedish)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sv/

* Translated using Weblate (Finnish)

Currently translated at 93.1% (54 of 58 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/fi/

* Translated using Weblate (Arabic)

Currently translated at 76.7% (446 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ar/

* Translated using Weblate (Slovak)

Currently translated at 93.2% (542 of 581 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/sk/

* Translated using Weblate (Arabic)

Currently translated at 100.0% (280 of 280 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/ar/

* Normalize translations
Ran i18n-tasks normalize && yarn manage:translations

Conflicts:
 	config/i18n-tasks.yml

Port WebUI toots/with reply/media tabs and pinned toots to glitch

Fix #6821

Display summary of attachments in description, and mark up content
warning if present, e.g.:

    Attached: 3 images · Content warning: Dota 2

When text is not supposed to be hidden, it looks more like:

    Attached: 3 images

    Here is the text of the toot

With #6817, multilinguagility should be assured...

Fix #6784

pretty quick fix, and with the 1 week expiration i don't think we need to be too worried about the existing files

closes #6798

Fix #6809

I don't know why, either

* Revert "Bump version to 2.3.2rc1"

This reverts commit cdf8b92fea.

* Revert "Downgrade Dockerfile to Ruby 2.4.3 on Alpine 3.6 (#6806)"

This reverts commit 0074cad44f.

* Revert "Handle Mastodon::HostValidationError when pulling remoteable assets (#6782)"

This reverts commit 4a0a19fe54.

* Revert "Correct the reference to user's password in mastodon:add_user task (#6800)"

This reverts commit 338bff8b93.

* Revert "Upgrade Paperclip to version 6.0.0 (#6754)"

This reverts commit b88fcd53f7.

Fix 6734

This will prevent, for example, `rake mastodon:redownload_avatars` from crashing when an instance is no longer responding to connection attempts, instead silently continuing as expected.

Apply "margin: 0 auto;" at line 443 to fix issue #6787

This is the first step to make Mastodon work offline. It is also required
by Chromium to trigger Web Manifest automated install prompt.