Merge remote-tracking branch 'origin/master' into 2.2

# Conflicts:
#	.editorconfig
#	docs/de/index.rst
#	docs/de/user/import.rst
#	docs/en/index.rst
#	docs/en/user/configuration.rst
#	docs/en/user/import.rst
#	docs/fr/index.rst
#	docs/fr/user/import.rst
#	src/Wallabag/CoreBundle/Command/InstallCommand.php
#	src/Wallabag/CoreBundle/Resources/translations/messages.da.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.de.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.en.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.es.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.fa.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.fr.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.it.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.oc.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.pl.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.pt.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.ro.yml
#	src/Wallabag/CoreBundle/Resources/translations/messages.tr.yml
#	src/Wallabag/CoreBundle/Resources/views/themes/baggy/Config/index.html.twig
#	web/bundles/wallabagcore/themes/baggy/css/style.min.css
#	web/bundles/wallabagcore/themes/baggy/js/baggy.min.js
#	web/bundles/wallabagcore/themes/material/css/style.min.css
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diff --git a/docs/de/developer/rabbitmq.rst b/docs/de/developer/rabbitmq.rst
deleted file mode 100644
index 143b64a1..00000000
--- a/docs/de/developer/rabbitmq.rst
+++ /dev/null
@@ -1,81 +0,0 @@
-Installiere RabbitMQ für asynchrone Aufgaben
-============================================
-
-Um asynchrone Aufgaben zu starten (nützlich z.B. für große Imports), können wir RabbitMQ nutzen.
-
-Voraussetzungen
----------------
-
-Du musst RabbitMQ auf deinem Server installiert haben.
-
-Installation
-~~~~~~~~~~~~
-
-.. code:: bash
-
-  wget https://www.rabbitmq.com/rabbitmq-signing-key-public.asc
-  apt-key add rabbitmq-signing-key-public.asc
-  apt-get update
-  apt-get install rabbitmq-server
-
-Konfiguration und Starten
-~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. code:: bash
-
-  rabbitmq-plugins enable rabbitmq_management # (useful to have a web interface, available at http://localhost:15672/ (guest/guest)
-  rabbitmq-server -detached
-
-RabbitMQ stoppen
-~~~~~~~~~~~~~~~
-
-.. code:: bash
-
-  rabbitmqctl stop
-
-
-Konfigure RabbitMQ in wallabag
-------------------------------
-
-Bearbeite die Datei ``app/config/parameters.yml``, um die RabbitMQ Konfiguration einzurichten. Die Standardkonfiguration sollte ok sein:
-
-.. code:: yaml
-
-    rabbitmq_host: localhost
-    rabbitmq_port: 5672
-    rabbitmq_user: guest
-    rabbitmq_password: guest
-
-Enable RabbitMQ in wallabag
----------------------------
-
-In internal settings, in the **Import** section, enable RabbitMQ (with the value 1).
-
-Starte den RabbitMQ Consumer
-----------------------------
-
-Abhängig von welchem Service du importieren möchtest, solltest du einen Cron Job aktivieren (oder mehrere, wenn du viele unterstützen willst):
-
-.. code:: bash
-
-  # for Pocket import
-  bin/console rabbitmq:consumer -e=prod import_pocket -w
-
-  # for Readability import
-  bin/console rabbitmq:consumer -e=prod import_readability -w
-
-  # for Instapaper import
-  bin/console rabbitmq:consumer -e=prod import_instapaper -w
-
-  # for wallabag v1 import
-  bin/console rabbitmq:consumer -e=prod import_wallabag_v1 -w
-
-  # for wallabag v2 import
-  bin/console rabbitmq:consumer -e=prod import_wallabag_v2 -w
-
-  # for Firefox import
-  bin/console rabbitmq:consumer -e=prod import_firefox -w
-
-  # for Chrome import
-  bin/console rabbitmq:consumer -e=prod import_chrome -w
-