##### SUMMARY
I think the `regex_replace` jinja filter should support `multiline` as the `regex_search` do.
Or maybe use a `flags` parameter to support any `re` flag.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
- `lib/ansible/plugins/filter/core.py`

##### ADDITIONAL INFORMATION
Example: comment a multiline variable.
```yaml
  val: "{{ val | regex_replace('^', '#', multiline=True) }}"
```
recursive = kwargs.pop('recursive', False)
    list_merge = kwargs.pop('list_merge', 'replace')
    if kwargs:
        raise AnsibleFilterError("'recursive' and 'list_merge' are the only valid keyword arguments")
    
    dictionaries = flatten(terms, levels=1)
    
    recursive_check_defined(dictionaries)
    if not dictionaries:
        return {}
    if len(dictionaries) == 1:
        return dictionaries[0]
    
    
    
    
    
    
    
    high_to_low_prio_dict_iterator = reversed(dictionaries)
    result = next(high_to_low_prio_dict_iterator)
    for dictionary in high_to_low_prio_dict_iterator:
        result = merge_hash(dictionary, result, recursive, list_merge)
    return result
def comment(text, style='plain', **kw):