prop224: Make hidden service load/create needed key materials

Code making an HS load or create key material when starting. The plan is to use the current torrc options for the "NOT offline key case".

This ticket should in the end bring the support for an HS to have all the necessary APIs/ABIs for key management.

The offline key case (partially in legacy/trac#18098 (moved)) will complement this code to support the offline key case where the HS has to load all blinded keys it can find.

added component::core tor/tor in Legacy / Trac priority::medium in Legacy / Trac prop224 in Legacy / Trac resolution::invalid in Legacy / Trac severity::normal in Legacy / Trac sponsor::R-must in Legacy / Trac status::closed in Legacy / Trac tor-hs in Legacy / Trac type::enhancement in Legacy / Trac labels

Trac:
Parent: legacy/trac#17239 (moved) to legacy/trac#17242 (moved)

Trac:
Keywords: tor-hs prop224 deleted, prop224, tor-hs added
Milestone: Tor: 0.2.9.x-final to Tor: 0.2.???
Sponsor: SponsorR to SponsorR-must
Reviewer: N/A to N/A

Hrm, this is part of the service implementation of "must have" anyway so it's kind of not useful to have this in a ticket. Unparenting and closing this as invalid.

Trac:
Parent: legacy/trac#17242 (moved) to N/A
Status: new to closed
Resolution: N/A to invalid

Milestone renamed

Trac:
Milestone: Tor: 0.2.??? to Tor: 0.3.???

Milestone deleted

Trac:
Milestone: Tor: 0.3.??? to N/A

closed

moved from legacy/trac#18278 (moved)

added Feature + 1 deleted label and removed 1 deleted label

added 1 deleted label and removed 1 deleted label