Nick Mathewson 96f1e69f24 Implement proposal 275: don't put "published" times in md consensus
When a new consensus method is negotiated, these values will all get
replaced with "2038-01-01 00:00:00".

This change should be safe because:

  * As of 0.2.9.11 / 0.3.0.7 / 0.3.1.1-alpha, Tor takes no action
    about published_on times in the future.

  * The only remaining parties relying on published_on values are (we
    believe) relays running 0.3.5.x, which rely on the values in a NS
    consensus to see whether their descriptors are out of date.  But
    this patch only changes microdesc consensuses.

  * The latest Tor no longer looks at this field in consensuses.

Why make this change?  In experiments, replacing these values with a
fixed value made the size of compressed consensus diffs much much
smaller.  (Like, by over 50%!)

Implements proposal 275; Implements #40130.
2021-11-09 13:43:48 -05:00
2021-11-03 09:53:35 -04:00
2020-08-12 14:09:32 +03:00
2021-10-06 15:12:04 -04:00
2018-07-05 11:22:33 +03:00
2018-07-05 11:22:33 +03:00
2018-07-03 16:34:52 +03:00

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