[doc] rearranges Settings & Engines docs for better readability

We have built up detailed documentation of the *settings* and the *engines* over
the past few years.  However, this documentation was still spread over various
chapters and was difficult to navigate in its entirety.

This patch rearranges the Settings & Engines documentation for better
readability.

To review new ordered docs::

   make docs.clean docs.live

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 0 insertions, 136 deletions

diff --git a/docs/admin/engines/search-indexer-engines.rst b/docs/admin/engines/search-indexer-engines.rst
deleted file mode 100644
index 51a661896..000000000
--- a/docs/admin/engines/search-indexer-engines.rst
+++ /dev/null
@@ -1,136 +0,0 @@
-====================
-Local Search Engines
-====================
-
-.. sidebar:: further read
-
-   - `Comparison to alternatives
-     <https://docs.meilisearch.com/learn/what_is_meilisearch/comparison_to_alternatives.html>`_
-
-Administrators might find themselves wanting to integrate locally running search
-engines.  The following ones are supported for now:
-
-* `Elasticsearch`_
-* `Meilisearch`_
-* `Solr`_
-
-Each search engine is powerful, capable of full-text search.  All of the engines
-above are added to ``settings.yml`` just commented out, as you have to
-``base_url`` for all them.
-
-Please note that if you are not using HTTPS to access these engines, you have to enable
-HTTP requests by setting ``enable_http`` to ``True``.
-
-Furthermore, if you do not want to expose these engines on a public instance, you
-can still add them and limit the access by setting ``tokens`` as described in
-section :ref:`private engines`.
-
-.. _engine meilisearch:
-
-MeiliSearch
-===========
-
-.. sidebar:: info
-
-   - :origin:`meilisearch.py <searx/engines/meilisearch.py>`
-   - `MeiliSearch <https://www.meilisearch.com>`_
-   - `MeiliSearch Documentation <https://docs.meilisearch.com/>`_
-   - `Install MeiliSearch
-     <https://docs.meilisearch.com/learn/getting_started/installation.html>`_
-
-MeiliSearch_ is aimed at individuals and small companies.  It is designed for
-small-scale (less than 10 million documents) data collections.  E.g. it is great
-for storing web pages you have visited and searching in the contents later.
-
-The engine supports faceted search, so you can search in a subset of documents
-of the collection.  Furthermore, you can search in MeiliSearch_ instances that
-require authentication by setting ``auth_token``.
-
-Here is a simple example to query a Meilisearch instance:
-
-.. code:: yaml
-
-  - name: meilisearch
-    engine: meilisearch
-    shortcut: mes
-    base_url: http://localhost:7700
-    index: my-index
-    enable_http: true
-
-
-.. _engine elasticsearch:
-
-Elasticsearch
-=============
-
-.. sidebar:: info
-
-   - :origin:`elasticsearch.py <searx/engines/elasticsearch.py>`
-   - `Elasticsearch <https://www.elastic.co/elasticsearch/>`_
-   - `Elasticsearch Guide
-     <https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html>`_
-   - `Install Elasticsearch
-     <https://www.elastic.co/guide/en/elasticsearch/reference/current/install-elasticsearch.html>`_
-
-Elasticsearch_ supports numerous ways to query the data it is storing.  At the
-moment the engine supports the most popular search methods (``query_type``):
-
-- ``match``,
-- ``simple_query_string``,
-- ``term`` and
-- ``terms``.
-
-If none of the methods fit your use case, you can select ``custom`` query type
-and provide the JSON payload to submit to Elasticsearch in
-``custom_query_json``.
-
-The following is an example configuration for an Elasticsearch_ instance with
-authentication configured to read from ``my-index`` index.
-
-.. code:: yaml
-
-  - name: elasticsearch
-    shortcut: es
-    engine: elasticsearch
-    base_url: http://localhost:9200
-    username: elastic
-    password: changeme
-    index: my-index
-    query_type: match
-    # custom_query_json: '{ ... }'
-    enable_http: true
-
-.. _engine solr:
-
-Solr
-====
-
-.. sidebar:: info
-
-   - :origin:`solr.py <searx/engines/solr.py>`
-   - `Solr <https://solr.apache.org>`_
-   - `Solr Resources <https://solr.apache.org/resources.html>`_
-   - `Install Solr <https://solr.apache.org/guide/installing-solr.html>`_
-
-Solr_ is a popular search engine based on Lucene, just like Elasticsearch_.  But
-instead of searching in indices, you can search in collections.
-
-This is an example configuration for searching in the collection
-``my-collection`` and get the results in ascending order.
-
-.. code:: yaml
-
-  - name: solr
-    engine: solr
-    shortcut: slr
-    base_url: http://localhost:8983
-    collection: my-collection
-    sort: asc
-    enable_http: true
-
-
-Acknowledgment
-==============
-
-This development was sponsored by `Search and Discovery Fund
-<https://nlnet.nl/discovery>`_ of `NLnet Foundation <https://nlnet.nl/>`_.