extensions: Minor fixes and additions

 - explain add-ld-path
 - explain .debug and .locale extensions are created with
   autodelete=true
 - Fix version of an extension

docs/extension.rst

@@ -79,7 +79,9 @@ further below.
 
 - ``add-ld-path`` adds a path relative to the extension prefix
  ``/app/extension_directory/foo/lib``, so that a library residing there
- can be loaded. This supports a single value.
+ can be loaded. This supports a single value. If the ``$LD_LIBRARY_PATH``
+ environment variable exists, the path here is appended to it, otherwise
+ it is put in a ld config file in ``/run/flatpak/ld.so.conf.d``.
 
 - ``merge-dirs: plug-ins;help`` will merge the contents of these
  directories from multiple extensions using the same extension point.
@@ -100,6 +102,9 @@ further below.
 - ``autodelete: true`` will remove all extensions under this extension
  point when the application is removed.
 
+ ``.Debug`` and ``.Locale`` extensions are created with 
+ ``autodelete: true`` by default.
+
 - ``mkdir -p ${FLATPAK_DEST}/extension_directory`` runs during the cleanup
  phase. It is used to initialise an empty directory for the extension to
  be loaded. This can also be done using ``post-install`` or ``build-commands``
@@ -173,8 +178,6 @@ in the application. The extension is loaded at runtime and the user needs
 to have it installed.
 
 The extensions are mounted in alphabetical path order of directory.
-ld-path prepended before ``/app/lib`` for app extensions and appended
-after ``/app/lib`` in case of runtime extensions.
 
 ``org.freedesktop.Platform.ffmpeg-full`` is an extension of the runtime
 ``org.freedesktop.Platform`` and ``org.kde.Platform`` is a child runtime
@@ -208,7 +211,7 @@ of ``org.freedesktop.Platform``.
  add-extensions:
  org.freedesktop.Sdk.Extension.texlive:
  directory: texlive
- version: '22.08'
+ version: '23.08'
  cleanup-commands:
  - mkdir -p ${FLATPAK_DEST}/texlive