##### 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
```

'''
        This method writes the PgHba rules (back) to a file.
        '''
        if not self.changed():
            return False
        contents = self.render()
        if self.pg_hba_file:
            if not (os.path.isfile(self.pg_hba_file) or self.create):
                raise PgHbaError("pg_hba file '{0}' doesn't exist. "
                                 "Use create option to autocreate.".format(self.pg_hba_file))
            if self.backup and os.path.isfile(self.pg_hba_file):
                if backup_file:
                    self.last_backup = backup_file
                else:
                    __backup_file_h, self.last_backup = tempfile.mkstemp(prefix='pg_hba')
                shutil.copy(self.pg_hba_file, self.last_backup)
            fileh = open(self.pg_hba_file, 'w')
        else:
            filed, __path = tempfile.mkstemp(prefix='pg_hba')
            fileh = os.fdopen(filed, 'w')
        fileh.write(contents)
        self.unchanged()
        fileh.close()
        return True
    def add_rule(self, rule):