Upgrade tor to 0.4.8.6

[fmarier]

Changes in version 0.4.8.6 - 2023-09-18
  This version contains an important fix for onion service regarding congestion
  control and its reliability. Apart from that, uneeded BUG warnings have been
  suppressed especially about a compression bomb seen on relays. We strongly
  recommend, in particular onion service operators, to upgrade as soon as
  possible to this latest stable.

  o Major bugfixes (onion service):
    - Fix a reliability issue where services were expiring their
      introduction points every consensus update. This caused
      connectivity issues for clients caching the old descriptor and
      intro points. Bug reported and fixed by gitlab user
      @hyunsoo.kim676. Fixes bug 40858; bugfix on 0.4.7.5-alpha.

  o Minor features (debugging, compression):
    - Log the input and output buffer sizes when we detect a potential
      compression bomb. Diagnostic for ticket 40739.

  o Minor features (fallbackdir):
    - Regenerate fallback directories generated on September 18, 2023.

  o Minor features (geoip data):
    - Update the geoip files to match the IPFire Location Database, as
      retrieved on 2023/09/18.

  o Minor bugfix (defensive programming):
    - Disable multiple BUG warnings of a missing relay identity key when
      starting an instance of Tor compiled without relay support. Fixes
      bug 40848; bugfix on 0.4.3.1-alpha.

  o Minor bugfixes (bridge authority):
    - When reporting a pseudo-networkstatus as a bridge authority, or
      answering "ns/purpose/*" controller requests, include accurate
      published-on dates from our list of router descriptors. Fixes bug
      40855; bugfix on 0.4.8.1-alpha.

  o Minor bugfixes (compression, zstd):
    - Use less frightening language and lower the log-level of our run-
      time ABI compatibility check message in our Zstd compression
      subsystem. Fixes bug 40815; bugfix on 0.4.3.1-alpha.