Fix more docs errors. (#39051)

* Fix remaining unknown-document docs errors.
* Fix last toc-tree-missing-document docs error.

(cherry picked from commit 9e8889bb70)

docs/docsite/rst/plugins/callback.rst

@@ -16,7 +16,7 @@ Example Callback Plugins
 The :doc:`_plays <callback/log_plays>` callback is an example of how to record playbook events to a log file,
 and the :doc:`mail <callback/mail>` callback sends email on playbook failures.
 
-The :doc:`osx_say <callback/oxs_say>` callback responds with computer synthesized speech on OS X in relation to playbook events.
+The :doc:`osx_say <callback/osx_say>` callback responds with computer synthesized speech on OS X in relation to playbook events.
 
 
 .. _enabling_callbacks:

docs/docsite/rst/plugins/connection.rst

@@ -39,7 +39,7 @@ Plugins are self-documenting. Each plugin should document its configuration opti
 :ref:`ansible_host<magic_variables_and_hostvars>`
     The name of the host to connect to, if different from the :ref:`inventory <intro_inventory>` hostname.
 :ref:`ansible_port<faq_setting_users_and_ports>`
-    The ssh port number, for :ref:`ssh <ssh_connection>` and :ref:`paramiko_ssh <paramiko_ssh_connection>` it defaults to 22.
+    The ssh port number, for :doc:`ssh <connection/ssh>` and :doc:`paramiko_ssh <connection/paramiko_ssh>` it defaults to 22.
 :ref:`ansible_user<faq_setting_users_and_ports>`
     The default user name to use for log in. Most plugins default to the 'current user running Ansible'.
 

docs/docsite/rst/user_guide/modules_intro.rst

@@ -44,7 +44,7 @@ Documentation for each module can be accessed from the command line with the ans
 
     ansible-doc yum
 
-For a list of all available modules, see :doc:`modules_by_category`, or run the following at a command prompt::
+For a list of all available modules, see :doc:`../modules/modules_by_category`, or run the following at a command prompt::
 
     ansible-doc -l
 

docs/docsite/rst/user_guide/plugin_filtering_config.rst

@@ -1,4 +1,4 @@
-.. _plugin_filter_config:
+.. _plugin_filtering_config:
 
 Plugin Filter Configuration
 ===========================

lib/ansible/config/base.yml

@@ -1453,7 +1453,7 @@ PLUGIN_FILTERS_CFG:
   version_added: "2.5.0"
   description:
     - "A path to configuration for filtering which plugins installed on the system are allowed to be used."
-    - "See :doc:`plugin_filtering_config` for details of the filter file's format."
+    - "See :ref:`plugin_filtering_config` for details of the filter file's format."
     - " The default is /etc/ansible/plugin_filters.yml"
   ini:
   - key: plugin_filters_cfg