##### 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
```

if os.path.exists(file):
            local_md5 = self._local_md5(file)
            if self.local:
                parsed_url = urlparse(remote_url)
                remote_md5 = self._local_md5(parsed_url.path)
            else:
                try:
                    remote_md5 = to_text(self._getContent(remote_url + '.md5', "Failed to retrieve MD5", False), errors='strict')
                except UnicodeError as e:
                    return "Cannot retrieve a valid md5 from %s: %s" % (remote_url, to_native(e))
                if(not remote_md5):
                    return "Cannot find md5 from " + remote_url
            try:
                
                _remote_md5 = remote_md5.split(None)[0]
                remote_md5 = _remote_md5
                
                
            except IndexError as e:
                pass
            if local_md5 == remote_md5: