Review of mpls_newrt() and mpls_rmx.c to increase orthogonality due to
route allocation is still in progress. Ongoing developement activities
aims generalizing of handoff from IPv[46] Data Plane into MPLS Transit
Domain by callof mpls_output().

Furthermore, if_mpe will be capable to perform VPLS (PW3)
aka MPLS VPN OSI-L3 services in near future.