[tproxy] what is a status of the SQUID (2.6 STABLE) patch

Hi. I find on the squid homepage about squid 2.6 patchh for tproxy4 "It is not yet finished, the squid proxy doesn't bind to the client's address." with link to patch from balabit site. what is a current status of the tproxy4 patch for 2.6.x-STABLE branch of squid ? ie full functionality etc ?