Rename "featuretoggles" docs target to "technical"

We also split the feature toggle and settings docs in different pages.

Makefile

@@ -21,7 +21,7 @@ clean: ## archive and delete most git-ignored files
 
 SWAGGER = docs/swagger.yaml
 
-docs: api-docs guides feature-toggles-docs ## build all the developer documentation for this repository
+docs: api-docs guides technical-docs ## build all the developer documentation for this repository
 
 swagger: ## generate the swagger.yaml file
 	DJANGO_SETTINGS_MODULE=docs.docs_settings python manage.py lms generate_swagger --generator-class=edx_api_doc_tools.ApiSchemaGenerator -o $(SWAGGER)
@@ -33,8 +33,8 @@ api-docs-sphinx: swagger	## generate the sphinx source files for api-docs
 api-docs: api-docs-sphinx	## build the REST api docs
 	cd docs/api; make html
 
-feature-toggles-docs:
-	$(MAKE) -C docs/featuretoggles html
+technical-docs:  ## build the technical docs
+	$(MAKE) -C docs/technical html
 
 guides:	## build the developer guide docs
 	cd docs/guides; make clean html

docs/featuretoggles/conf.py → docs/technical/conf.py

 """
-Configuration file for the generation of feature toggle documentation.
+Configuration file for the generation of technical documentation.
 """
 import os
 
@@ -8,7 +8,7 @@ import git
 
 # -- Project information -----------------------------------------------------
 
-project = "Open edX feature toggles"
+project = "edx-platform technical reference"
 copyright = edx_theme.COPYRIGHT  # pylint: disable=redefined-builtin
 author = edx_theme.AUTHOR
 release = ""

docs/featuretoggles/index.rst → docs/technical/featuretoggles.rst

-Open edX Django settings
-========================
+.. _featuretoggles:
 
-This is the list of Django settings defined in the ``common.py`` modules of edx-platform.
-
-LMS settings
-------------
-
-.. TODO move this to a dedicated page
-.. settings::
-    :folder_path: lms/envs/common.py
-
-CMS settings
-------------
-
-.. settings::
-    :folder_path: cms/envs/common.py
-
-
-Open edX Feature Toggles
-========================
+Feature Toggles
+===============
 
 This is the list of all Open edX feature toggles used in edx-platform. These feature toggles can be used to enable or disable features manually on every platform.
 

docs/technical/index.rst

+====================================
+``edx-platform`` technical reference
+====================================
+
+This is the technical documentation reference for edx-platform.
+
+.. toctree::
+    settings
+    featuretoggles

docs/technical/settings.rst

+Settings
+========
+
+This is the list of (non-toggle) Django settings defined in the ``common.py`` modules of edx-platform.
+
+.. note::
+    Toggle settings, which enable or disable a specific feature, are documented in the :ref:`feature toggles <featuretoggles>` section.
+
+LMS settings
+------------
+
+.. settings::
+    :folder_path: lms/envs/common.py
+
+CMS settings
+------------
+
+.. settings::
+    :folder_path: cms/envs/common.py