Add a "make test-network-ipv6" target, which runs IPv6 chutney networks

Part of legacy/trac#33195 (moved).

changed milestone to %Tor: 0.4.4.x-final in legacy/trac

Trac:
Parent Ticket: legacy/trac#33050 (moved)

added chutney in Legacy / Trac component::core tor/tor in Legacy / Trac ipv6 in Legacy / Trac milestone::Tor: 0.4.4.x-final in Legacy / Trac network-team-roadmap-2020Q1 in Legacy / Trac owner::teor in Legacy / Trac parent::33050 in Legacy / Trac priority::medium in Legacy / Trac resolution::fixed in Legacy / Trac severity::normal in Legacy / Trac sponsor::55-must in Legacy / Trac status::closed in Legacy / Trac tor-ci in Legacy / Trac type::task in Legacy / Trac labels

Reviews and points in legacy/trac#33195 (moved).

Trac:
Resolution: N/A to fixed
Status: assigned to closed

Trac:
Parent: legacy/trac#33195 (moved) to legacy/trac#33050 (moved)
Points: 0.1 to N/A

Add all the tickets from sponsor 55 that are done and being worked on to the keyword #network-team-roadmap-2020Q1 so I can look at them in the wiki page...

Trac:
Keywords: N/A deleted, network-team-roadmap-2020Q1 added

closed

mentioned in issue legacy/trac#33300 (moved)

mentioned in issue legacy/trac#33302 (moved)

mentioned in issue legacy/trac#33050 (moved)

moved from legacy/trac#33280 (moved)

mentioned in issue chutney#33050 (closed)

added Task + 1 deleted label and removed 1 deleted label

added CI IPv6 Tests labels and removed 1 deleted label