ssh_executable docs (#17868)

* ssh_executable docs

Added docs about ssh_executable in intro_configuration and
intro_inventory under behavioral inventory params

* Added full stops + \n in intro_configuration

docsite/rst/intro_configuration.rst

@@ -968,6 +968,19 @@ recommended if you can enable it, eliminating the need for :doc:`playbooks_accel
 
     pipelining=False
 
+.. _ssh_executable:
+
+ssh_executable
+==============
+
+.. versionadded:: 2.2
+
+This is the location of the ssh binary. It defaults to ``ssh`` which will use the first ssh binary available in ``$PATH``. This config can also be overridden with ``ansible_ssh_executable`` inventory variable::
+
+  ssh_executable="/usr/local/bin/ssh"
+
+This option is usually not required, it might be useful when access to system ssh is restricted, or when using ssh wrappers to connect to remote hosts. 
+
 .. _accelerate_settings:
 
 Accelerated Mode Settings

docsite/rst/intro_inventory.rst

@@ -233,6 +233,10 @@ ansible_ssh_extra_args
     This setting is always appended to the default :command:`ssh` command line.
 ansible_ssh_pipelining
     Determines whether or not to use SSH pipelining. This can override the ``pipelining`` setting in :file:`ansible.cfg`.
+.. versionadded:: 2.2
+ansible_ssh_executable
+    This setting overrides the default behavior to use the system :command:`ssh`. This can override the ``ssh_executable`` setting in :file:`ansible.cfg`.
+
 
 Privilege escalation (see :doc:`Ansible Privilege Escalation<become>` for further details):