[[!comment format=mdwn
 username="amcalvo"
 ip="78.53.114.169"
 subject="comment 4"
 date="2014-05-05T21:56:36Z"
 content="""
A correction to the above comment, one needs activate multiple replacements:

~~~
        sub_filter 'http://example.com' 'https://example.com';
        sub_filter_once off;
~~~
"""]]