* Add yarn-error.log to gitignore

* Add yarn-debug.log to gitignore

Updating some arabic translations.

* Update doorkeeper.ar.yml

- Remodelling doorkeeper.ar.yml and adding missing strings from english version to arabic version.
- Translating max strings
- Reviewing some translations
- Other strings to be translated later (complicated somehow)

* Update doorkeeper.ar.yml

Updating translations from lines : 88 to 91

There are some dependencies that are no longer needed anymore.
As a result, it took more time to install the package than necessary.

I want to delete them and shorten the installation time.

Fix #2221 - Catch OpenSSL exceptions when loading remote avatars/headers/attachments
Don't strip "rel" attribute from <a> tags when sanitizing (microformats)

* Fix #2027 - Accept own ID for remote follow with and without preceding @
Fix #2177 - Omit leading "acct:" in remote follow redirect template expansion

* Fix test

Receiving instances will then use their own missing image

Also, add <content /> to deleted statuses, since there was a reported
problem with the deletes and GNU social

Fixes #2941

Follow up #2902

* Fix regressions from #2683

Properly format spoiler text HTML, while keeping old logic for blankness intact
Process hashtags and mentions in spoiler text
Format spoiler text for Atom
Change "show more" toggle into a button instead of anchor
Fix style regression on dropdowns for detailed statuses

* Fix lint issue

* Convert spoiler text to plaintext in desktop notifications

* Very small fix/update NL strings

* Oops

* Add specs for valid challenge response from pubsub confirmation worker

* Refactor the pubsub confirmation worker

that caused user pages to break when showing toots with CWs

* Spec for feed insert worker when missing records

* more specs!

* Refactor feed insert worker

Vorbis is audio format of Open Source.
Can play audio in a free environment where you can not play mp3.

* Fix the pluralRuleFunction of the locale data.
* Added more descriptions about how to write it.

According to the release message:
> Fix for macOS and minor improvements

* services: scan spoiler_text for hashtags (#699)

* views: link hashtags from spoiler_texts

This covers linking hashtags from within the spoiler
text on the server-generated pages.

* services: fix string concat going into hashtag RE

Cleaner Ruby syntax, may handle immutable strings better

to all subscribers. IDN-normalize callback URLs for subscriptions on insert.

* Add spec for pubsubhubbub/subscribe

* Refactor pubsubhubbub/subscribe service

* Add coverage for pubsub unsubscribe service

* Refactor pubsub unsubscribe service

Compact Language Detector v3 (CLD3) is the successor of CLD2, which was
used in the previous implementation. CLD3 includes improvements since CLD2,
and supports newer compilers. On the other hand, it has additional
requirements and cld3-ruby, the FFI of CLD3 for Ruby, is still new and may
be still inmature.

Though CLD3 is named after CLD2, it is implemented with a neural network
model, different from the old implementation, which is based on a Naïve
Bayesian classifier.

CLD3 supports newer compilers, such as GCC 6. CLD2 is not compatible with
GCC 6 because it assigns negative values to varibales typed unsigned.
(see internal/cld_generated_cjk_uni_prop_80.cc) The support for GCC 6 and
newer compilers are essential today, when some server operating system
such as Ubuntu Server 16.10 has GCC 6 by default.

On the one hand, CLD3 requires C++11 support. Environments with old
compilers such as Ubuntu Server 14.04 needs to update the system or install
a newer compiler.

CLD3 needs protocol buffers as a new dependency. However,it is not
considered problematic because major server operating systems, CentOS and
Ubuntu Server provide them.

The FFI cld3-ruby was written by me (Akihiko Odaki) for use in Mastodon.
It is still new and may be inmature, but confirmed to pass existing tests.

ExtractTextWebpackPlugin extracts the content of loaded files, which means
it loads files loaded by require.context but not required after that.
However the former implementation is not aware of that.

require.context can have a RegExp to filter files to load. This change
gives a RegExp which matches with SCSSes with 'custom' prefix to
require.context to take advantage of the feature.