HAProxy 1.5 replace or empty query parameter value


I am using haproxy 1.5 on CentOS 7.
I am trying to either remove or empty out a url parameter value, if it is found, before sending out.
I see it is possible to identify it with acl paginationParameter urlp(PagingContext) -m found
Is this possible, and how do I do it?


Figured out how to (remove, though) the parameter with

reqrep ^(.*)(&|\?)QueryParamerIdontLike=[^&]+&(.*) \1\2\3

This strips the parameter and its content away.
It can sit at the frontend or backend space.