Modify LB IP with dns suffix when the proxy protocol is used

Created by: chess-knight

Related to SovereignCloudStack/issues#250 and #184 (closed)

See also https://github.com/kubernetes/cloud-provider-openstack/blob/master/docs/openstack-cloud-controller-manager/expose-applications-using-loadbalancer-type-service.md#use-proxy-protocol-to-preserve-client-ip

Signed-off-by: Roman Hros roman.hros@dnation.cloud