HAproxy broadcast support

Hi,

I'm going to run two web servers, and HAproxy as load balancer in front of them.
Each of web servers uses own disk cache, which can be flushed by doing a http request /requestfile/flush.
I'd like to setup HAproxy to forward specific type requests to all servers in the pool, instead of to specific one.

Do you know if it possible to do?

Thanks in advance

-- 
Mitya Korochkin