##### SUMMARY
If a module sets `add_file_common_args=True` when calling `AnsibleModule`, all elements from [FILE_COMMON_ARGUMENTS](https://github.com/ansible/ansible/blob/e9d29b1fe4285d90d7a4506b80260a9e24c3bcea/lib/ansible/module_utils/basic.py#L229-L257) are included in the argument spec. The [files document fragment](https://github.com/ansible/ansible/blob/e9d29b1fe4285d90d7a4506b80260a9e24c3bcea/lib/ansible/plugins/doc_fragments/files.py#L15-L80) only documents a subset of them, though. Missing are:
 - src
 - follow
 - force
 - content
 - backup
 - remote_src
 - regexp
 - delimiter
 - directory_mode

Most module authors using `add_file_common_args=True` are probably not aware that their modules have these options as well.

I don't think these extra options should be added by default if `add_file_common_args=True` is specified.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
lib/ansible/module_utils/basic.py

##### ANSIBLE VERSION
```
devel
```

description:
    - The permissions of the destination file or directory.
    - For those used to C(/usr/bin/chmod) remember that modes are actually octal numbers.
      You must either add a leading zero so that Ansible's YAML parser knows it is an octal number
      (like C(0644) or C(01777))or quote it (like C('644') or C('1777')) so Ansible receives a string
      and can do its own conversion from string into number. Giving Ansible a number without following
      one of these rules will end up with a decimal number which will have unexpected results.
    - As of Ansible 1.8, the mode may be specified as a symbolic mode (for example, C(u+rwx) or C(u=rw,g=r,o=r)).
    - As of Ansible 2.3, the mode may also be the special string C(preserve).
    - C(preserve) means that the file will be given the same permissions as the source file.
    type: path
  directory_mode:
    description:
    - When doing a recursive copy set the mode for the directories.
    - If this is not set we will use the system defaults.
    - The mode is only set on directories which are newly created, and will not affect those that already existed.
    type: raw
    version_added: '1.5'
  remote_src:
    description:
    - Influence whether C(src) needs to be transferred or already is present remotely.
    - If C(no), it will search for C(src) at originating/master machine.
    - If C(yes) it will go to the remote/target machine for the C(src).
    - C(remote_src) supports recursive copying as of version 2.8.
    - C(remote_src) only works with C(mode=preserve) as of version 2.6.
    type: bool
    default: no
    version_added: '2.0'
  follow:
    description: