Config continued (#31024)

* included inventory and callback in new config

allow inventory to be configurable
updated connection options settings
also updated winrm to work with new configs
removed now obsolete set_host_overrides
added notes for future bcoca, current one is just punting, it's future's problem
updated docs per feedback
added remove group/host methods to inv data
moved fact cache from data to constructed
cleaner/better options
fix when vars are added
extended ignore list to config dicts
updated paramiko connection docs
removed options from base that paramiko already handles
left the look option as it is used by other plugin types
resolve delegation
updated cache doc options
fixed test_script
better fragment merge for options
fixed proxy command
restore ini for proxy
normalized options
moved pipelining to class
updates for host_key_checking
restructured mixins

* fix typo

lib/ansible/plugins/connection/ssh.py

@@ -22,14 +22,23 @@ DOCUMENTATION = '''
                - name: ansible_host
                - name: ansible_ssh_host
       host_key_checking:
-          #constant: HOST_KEY_CHECKING
           description: Determines if ssh should check host keys
           type: boolean
           ini:
               - section: defaults
                 key: 'host_key_checking'
+              - section: ssh_connection
+                key: 'host_key_checking'
+                version_added: '2.5'
           env:
               - name: ANSIBLE_HOST_KEY_CHECKING
+              - name: ANSIBLE_SSH_HOST_KEY_CHECKING
+                version_added: '2.5'
+          vars:
+              - name: ansible_host_key_checking
+                version_added: '2.5'
+              - name: ansible_ssh_host_key_checking
+                version_added: '2.5'
       password:
           description: Authentication password for the C(remote_user). Can be supplied as CLI option.
           vars: