Relocated content from docs/topics/external-packages.txt where appropriate.

Following up a forum post and a conversation with the Steering Council,
it was decided to remove the docs/topics/external-packages.txt to avoid
confusion with the Ecosystem page. Relevant content was moved to their
related sections, except for `django-contrib-comments` which is not
actively maintained.

Thank you Tim Schilling for the review.

4 files changed, 12 insertions, 39 deletions

diff --git a/docs/topics/external-packages.txt b/docs/topics/external-packages.txt
deleted file mode 100644
index 4dc863ba1c..0000000000
--- a/docs/topics/external-packages.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-=================
-External packages
-=================
-
-Django ships with a variety of extra, optional tools that solve common
-problems (``contrib.*``). For easier maintenance and to trim the size of the
-codebase, a few of those applications have been moved out to separate projects.
-
-Localflavor
-===========
-
-``django-localflavor`` is a collection of utilities for particular countries
-and cultures.
-
-* `GitHub <https://github.com/django/django-localflavor>`__
-* `Documentation <https://django-localflavor.readthedocs.io/>`__
-* :pypi:`PyPI <django-localflavor>`
-
-Comments
-========
-
-``django-contrib-comments`` can be used to attach comments to any model, so you
-can use it for comments on blog entries, photos, book chapters, or anything
-else. Most users will be better served with a custom solution, or a hosted
-product like Disqus.
-
-* `GitHub <https://github.com/django/django-contrib-comments>`__
-* `Documentation <https://django-contrib-comments.readthedocs.io/>`__
-* :pypi:`PyPI <django-contrib-comments>`
-
-Formtools
-=========
-
-``django-formtools`` is a collection of assorted utilities to work with forms.
-
-* `GitHub <https://github.com/jazzband/django-formtools/>`__
-* `Documentation <https://django-formtools.readthedocs.io/>`__
-* :pypi:`PyPI <django-formtools>`
diff --git a/docs/topics/forms/index.txt b/docs/topics/forms/index.txt
index 04c795352f..ba78b43023 100644
--- a/docs/topics/forms/index.txt
+++ b/docs/topics/forms/index.txt
@@ -856,3 +856,7 @@ This covers the basics, but forms can do a whole lot more:
     :doc:`The Forms Reference </ref/forms/index>`
         Covers the full API reference, including form fields, form widgets,
         and form and field validation.
+
+    :pypi:`django-formtools`
+        Provides additional form utilities, such as form previews and wizards
+        (`documentation <https://django-formtools.readthedocs.io/>`_).
diff --git a/docs/topics/i18n/formatting.txt b/docs/topics/i18n/formatting.txt
index ed941a20e0..62ce308d3c 100644
--- a/docs/topics/i18n/formatting.txt
+++ b/docs/topics/i18n/formatting.txt
@@ -47,6 +47,14 @@ argument::
         product = forms.CharField()
         revenue = forms.DecimalField(max_digits=4, decimal_places=2, localize=True)
 
+Locale specific helpers
+-----------------------
+
+For country specific form fields, validation, and data formats that are not
+included in Django itself, consider using the :pypi:`django-localflavor`
+package, which provides localized form fields and utilities for many countries
+and regions (`documentation <https://django-localflavor.readthedocs.io/>`_).
+
 .. _topic-l10n-templates:
 
 Controlling localization in templates
diff --git a/docs/topics/index.txt b/docs/topics/index.txt
index 59484d9799..8df59f63f2 100644
--- a/docs/topics/index.txt
+++ b/docs/topics/index.txt
@@ -31,6 +31,5 @@ Introductions to all the key parts of Django you'll need to know:
    settings
    signals
    checks
-   external-packages
    async
    tasks