Make sure Tor can shut down via control port, and start again in same process

In order to stop tor and restart it cleanly, we would need a tor control port command to tell it to stop and cleanup all it's state so we can call the tor main again.

This involves ensuring that all static variables are properly reset and cleanup is done correctly.

Having good integration tests can go a long ways in ensuring that nothing breaks here.

changed milestone to %Tor: 0.3.3.x-final

added 034-removed-20180328 034-triage-20180328 component::core tor/tor milestone::Tor: 0.3.3.x-final parent::23684 priority::medium resolution::implemented s8-api severity::normal sponsor::8 status::closed tor-mobile type::enhancement labels

Trac:
Cc: darkk, brade, mcs, ahf, nickm to darkk, brade, mcs, ahf, nickm, mike@tig.as

Trac:
Cc: darkk, brade, mcs, ahf, nickm, mike@tig.as to darkk, brade, mcs, ahf, nickm, mike@tig.as, arthuredelstein

This doesn't necessarily need to be a new command; it could also be new behavior for (say) "SIGNAL SHUTDOWN" or "SIGNAL HALT".

Trac:
Sponsor: N/A to Sponsor8

Trac:
Summary: Add shutdown command to Tor control port to Make sure Tor can shut down via control port, and start again in same process

Trac:
Keywords: N/A deleted, s8-api added

Trac:
Username: cretz
Cc: darkk, brade, mcs, ahf, nickm, mike@tig.as, arthuredelstein to darkk, brade, mcs, ahf, nickm, mike@tig.as, arthuredelstein, cretz

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

Per our triage process, these tickets are pending removal from 0.3.4.

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

Reparenting children to #25510 (moved) and closing.

Trac:
Resolution: N/A to implemented
Status: new to closed
Milestone: Tor: 0.3.4.x-final to Tor: 0.3.3.x-final

closed

mentioned in issue #24204 (moved)

mentioned in issue #24337 (moved)

mentioned in issue #24581 (moved)

mentioned in issue #24583 (moved)

mentioned in issue #24584 (moved)

mentioned in issue #24586 (moved)

moved to tpo/core/tor#23847 (closed)

mentioned in issue tpo/core/tor#24337 (closed)

mentioned in issue tpo/core/tor#24581 (closed)

mentioned in issue tpo/core/tor#24584 (closed)