New plan is in 3 phases: 1) emit=v1, accept=v0, protover=v0 2) emit=v1, accept=v0, protover=v1 3) emit=v1, accept=v1, protover=v1 See https://trac.torproject.org/projects/tor/ticket/30364#comment:8 for the rationale. This ticket is only for updating proposal 289 text.