Implement prop#249 "Large Create Cells"

As part of #24985 (moved), we'll need to implement prop#249's design for large create cells.

changed milestone to %Tor: unspecified

added 034-included-20180328 034-roadmap-master 034-triage-20180328 035-roadmap-master 035-triaged-in-20180711 component::core tor/tor milestone::Tor: unspecified parent::24985 points::8 priority::medium severity::normal sponsor::3 status::new tor-cell tor-circuit trunnel type::enhancement labels

Trac:
Cc: N/A to dgoulet, isis, nickm

Trac:
Keywords: tor-cell tor-circuit trunnel deleted, tor-cell tor-circuit trunnel 034-roadmap-master added

Trac:
Keywords: tor-cell tor-circuit trunnel 034-roadmap-master deleted, 034-roadmap-master, trunnel, 034-triage-20180328, tor-cell, tor-circuit added

Trac:
Keywords: N/A deleted, 034-included-20180328 added

These are still worth doing, but I don't see them as likely to happen before our freeze in 4 days, and nobody is currently assigned to them. Deferring them to 0.3.5

Trac:
Milestone: Tor: 0.3.4.x-final to Tor: 0.3.5.x-final

Trac:
Keywords: N/A deleted, 035-roadmap-master added

Trac:
Keywords: N/A deleted, 035-triaged-in-20180711 added

Trac:
Cc: dgoulet, isis, nickm to dgoulet, isis, nickm, dmr

We won't get PQ or wide-create done in this release. :/

Trac:
Milestone: Tor: 0.3.5.x-final to Tor: unspecified

changed time estimate to 64h

mentioned in issue #24987 (moved)

mentioned in issue #24988 (moved)

mentioned in issue #25651 (moved)

mentioned in issue #25655 (moved)

mentioned in issue #25656 (moved)

moved to tpo/core/tor#24986 (closed)

mentioned in issue tpo/core/tor#24987 (closed)

mentioned in issue tpo/core/tor#24988 (closed)