Read `/proc/sys/net/ipv4/ip_local_port_range` kernel parameter to obtain ephemeral port range that now sets the boundaries of port allocator which finds free host ports for those exported by containers. Signed-off-by: Michal Minar <miminar@redhat.com> Upstream-commit: 0eb3544c43cb8e9488d6bf329ceecc11fa0db6f1 Component: engine