##### 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
```

choices: [present,absent]
    timeout:
        description:
            - Specifies a timeout in seconds for the connection attempt
        default: 10
        version_added: "2.3"
    validate_certs:
        description:
            - If C(no), SSL certificates will not be validated. This should only be set to C(no) when no other option exists.
        type: bool
        default: 'yes'
        version_added: "1.9.3"
    keep_name:
        description:
            - If C(yes), the downloaded artifact's name is preserved, i.e the version number remains part of it.
            - This option only has effect when C(dest) is a directory and C(version) is set to C(latest) or C(version_by_spec)
              is defined.
        type: bool
        default: 'no'
        version_added: "2.4"
    verify_checksum:
        description:
            - If C(never), the md5 checksum will never be downloaded and verified.
            - If C(download), the md5 checksum will be downloaded and verified only after artifact download. This is the default.
            - If C(change), the md5 checksum will be downloaded and verified if the destination already exist,
              to verify if they are identical. This was the behaviour before 2.6. Since it downloads the md5 before (maybe)
              downloading the artifact, and since some repository software, when acting as a proxy/cache, return a 404 error
              if the artifact has not been cached yet, it may fail unexpectedly.
              If you still need it, you should consider using C(always) instead - if you deal with a checksum, it is better to
              use it to verify integrity after download.