Reduce NumDirectoryGuards to 1

Right now, it sits at 3, but asn makes some good points about reducing it in discussions on legacy/trac#20831 (moved)

changed milestone to %Tor: unspecified in legacy/trac

added client-enumeration in Legacy / Trac component::core tor/tor in Legacy / Trac guards in Legacy / Trac milestone::Tor: unspecified in Legacy / Trac needs-design in Legacy / Trac parent::20822 in Legacy / Trac points::3 in Legacy / Trac priority::medium in Legacy / Trac severity::normal in Legacy / Trac status::new in Legacy / Trac tor-client in Legacy / Trac triaged-out-20170116 in Legacy / Trac type::defect in Legacy / Trac labels

See also legacy/trac#13908 (moved) -- "Make it safe to set NumDirectoryGuards=1"

Assigning points value based on how much discussion I think this will take. :)

Trac:
Points: N/A to 3

Trac:
Keywords: N/A deleted, triaged-out-20160116 added
Milestone: Tor: 0.3.0.x-final to Tor: unspecified

Trac:
Keywords: triaged-out-20160116 deleted, triaged-out-20170116 added

Trac:
Keywords: triaged-out-20170116 deleted, triaged-out-20170116 client-enumeration tor-client needs-design added

Trac:
Sponsor: N/A to SponsorV-can

Removing sponsor V as we do not have more time to include this tickets in the sponsor.

Removing sponsor from tickets that we do not have time to fit in the remain of this sponsorship.

Trac:
Sponsor: SponsorV-can to N/A

changed time estimate to 24h

moved from legacy/trac#21006 (moved)

added Bug label and removed 1 deleted label

added Client Guards Research labels and removed 1 deleted label

added Proposal Ideas label

removed Bug label

removed milestone

Closed in favor of torspec#95.

closed