##### SUMMARY
<!--- Explain the problem briefly below, add suggestions to wording or structure -->
The [main configuration documentation](https://docs.ansible.com/ansible/latest/reference_appendices/config.html#ansible-pipelining) says that pipelining is enabled in the `ssh_connection` or `connection` section.

The [ssh connection plugin](https://docs.ansible.com/ansible/latest/plugins/connection/ssh.html#parameter-pipelining) configuration says pipelining should  be enabled in the `defaults` section.

#31125 (and the associated commit) seems to imply that the `ssh_connection` section is legacy, but the comments (https://github.com/ansible/ansible/issues/31125#issuecomment-334071699) seem to say otherwise.

The actual sections (as demonstrated in the configuration section below) that works are `ssh_connection` and `connection`.


##### ISSUE TYPE
- Documentation Report

##### COMPONENT NAME
ssh

##### ANSIBLE VERSION

```paste below
ansible 2.9.9
  config file = /c/xxx/ansible/ansible.cfg
  configured module search path = ['/c/Users/bendem/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /c/Users/bendem/.local/share/virtualenvs/ansible-oaopcvR0/lib/python3.8/site-packages/ansible
  executable location = /c/Users/bendem/.local/share/virtualenvs/ansible-oaopcvR0/bin/ansible
  python version = 3.8.3 (default, May 18 2020, 08:39:23) [GCC 9.3.0]
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
With `[defaults]\npipelining = true`

```
ALLOW_WORLD_READABLE_TMPFILES(/c/xxx/ansible/ansible.cfg) = False
ANSIBLE_SSH_EXECUTABLE(/c/xxx/ansible/ansible.cfg) = /usr/bin/ssh
ANSIBLE_SSH_RETRIES(/c/xxx/ansible/ansible.cfg) = 1
DEFAULT_HOST_LIST(/c/xxx/ansible/ansible.cfg) = ['/c/xxx/ansible/inventory/inventory.ini']
DEFAULT_ROLES_PATH(/c/xxx/ansible/ansible.cfg) = ['/c/xxx/ansible/vendors/roles', '/c/xxx/ansible/roles']
DEFAULT_VAULT_ID_MATCH(/c/xxx/ansible/ansible.cfg) = true
DIFF_ALWAYS(/c/xxx/ansible/ansible.cfg) = True
INTERPRETER_PYTHON(/c/xxx/ansible/ansible.cfg) = /usr/bin/python3
INVENTORY_UNPARSED_IS_FAILED(/c/xxx/ansible/ansible.cfg) = True
```

With `[ssh_connection]\npipelining = true`

```paste below
ALLOW_WORLD_READABLE_TMPFILES(/c/xxx/ansible/ansible.cfg) = False
ANSIBLE_PIPELINING(/c/xxx/ansible/ansible.cfg) = True
ANSIBLE_SSH_EXECUTABLE(/c/xxx/ansible/ansible.cfg) = /usr/bin/ssh
ANSIBLE_SSH_RETRIES(/c/xxx/ansible/ansible.cfg) = 1
DEFAULT_HOST_LIST(/c/xxx/ansible/ansible.cfg) = ['/c/xxx/ansible/inventory/inventory.ini']
DEFAULT_ROLES_PATH(/c/xxx/ansible/ansible.cfg) = ['/c/xxx/ansible/vendors/roles', '/c/xxx/ansible/roles']
DEFAULT_VAULT_ID_MATCH(/c/xxx/ansible/ansible.cfg) = true
DIFF_ALWAYS(/c/xxx/ansible/ansible.cfg) = True
INTERPRETER_PYTHON(/c/xxx/ansible/ansible.cfg) = /usr/bin/python3
INVENTORY_UNPARSED_IS_FAILED(/c/xxx/ansible/ansible.cfg) = True
```

With `[connection]\npipelining = true`

```paste below
ALLOW_WORLD_READABLE_TMPFILES(/c/xxx/ansible/ansible.cfg) = False
ANSIBLE_PIPELINING(/c/xxx/ansible/ansible.cfg) = True
ANSIBLE_SSH_EXECUTABLE(/c/xxx/ansible/ansible.cfg) = /usr/bin/ssh
ANSIBLE_SSH_RETRIES(/c/xxx/ansible/ansible.cfg) = 1
DEFAULT_HOST_LIST(/c/xxx/ansible/ansible.cfg) = ['/c/xxx/ansible/inventory/inventory.ini']
DEFAULT_ROLES_PATH(/c/xxx/ansible/ansible.cfg) = ['/c/xxx/ansible/vendors/roles', '/c/xxx/ansible/roles']
DEFAULT_VAULT_ID_MATCH(/c/xxx/ansible/ansible.cfg) = true
DIFF_ALWAYS(/c/xxx/ansible/ansible.cfg) = True
INTERPRETER_PYTHON(/c/xxx/ansible/ansible.cfg) = /usr/bin/python3
INVENTORY_UNPARSED_IS_FAILED(/c/xxx/ansible/ansible.cfg) = True
```

##### OS / ENVIRONMENT
Windows 10, msys2 python3, not that it matters.

##### ADDITIONAL INFORMATION
<!--- Describe how this improves the documentation, e.g. before/after situation or screenshots -->

<!--- HINT: You can paste gist.github.com links for larger files -->

elif u'No space left on device' in result['stderr']:
                output = result['stderr']
            else:
                output = ('Failed to create temporary directory.'
                          'In some cases, you may have been able to authenticate and did not have permissions on the target directory. '
                          'Consider changing the remote tmp path in ansible.cfg to a path rooted in "/tmp", for more error information use -vvv. '
                          'Failed command was: %s, exited with result %d' % (cmd, result['rc']))
            if 'stdout' in result and result['stdout'] != u'':
                output = output + u", stdout output: %s" % result['stdout']
            if self._play_context.verbosity > 3 and 'stderr' in result and result['stderr'] != u'':
                output += u", stderr output: %s" % result['stderr']
            raise AnsibleConnectionFailure(output)
        else:
            self._cleanup_remote_tmp = True
        try:
            stdout_parts = result['stdout'].strip().split('%s=' % basefile, 1)
            rc = self._connection._shell.join_path(stdout_parts[-1], u'').splitlines()[-1]
        except IndexError:
            
            rc = '/'
        
        
        if rc == '/':
            raise AnsibleError('failed to resolve remote temporary directory from %s: `%s` returned empty string' % (basefile, cmd))
        self._connection._shell.tmpdir = rc
        return rc
    def _should_remove_tmp_path(self, tmp_path):
        '''Determine if temporary path should be deleted or kept by user request/config'''
        return tmp_path and self._cleanup_remote_tmp and not C.DEFAULT_KEEP_REMOTE_FILES and "-tmp-" in tmp_path
    def _remove_tmp_path(self, tmp_path):