Feature request

There was a fix applied to rmw_fastrtps in master to fix the issues launching multiple nodes with ROS_LOCALHOST_ONLY set to 1(true). However, the issue still exists in foxy so I would like have them backported.

Feature description

#1052
ros2/rmw_fastrtps#476
Applying changes made in the above pull reqest to Foxy.

Please close this issue if it is already ongoing somewhere else.