add docs for hostportPfx and porthostPfx (#1067)
add docs for hostportPfx and porthostPfx (#1067)


pawelprazak/linkerd,hhtpcd/linkerd,denverwilliams/linkerd,linkerd/linkerd,linkerd/linkerd,denverwilliams/linkerd,denverwilliams/linkerd,hhtpcd/linkerd,pawelprazak/linkerd,denverwilliams/linkerd,BuoyantIO/linkerd,linkerd/linkerd,pawelprazak/linkerd,BuoyantIO/linkerd,hhtpcd/linkerd