[tor-bugs] #32672 [Core Tor/Tor]: Reject 0.2.9 and 0.4.0 in dirserv_rejects_tor_version()

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#32672: Reject 0.2.9 and 0.4.0 in dirserv_rejects_tor_version()
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  neel
     Type:  task                                 |         Status:
                                                 |  merge_ready
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.4.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  044-should, 043-backport,            |  Actual Points:
  041-backport, 042-backport, consider-          |
  backport-after-authority-test, fast-fix,       |
  network-health                                 |
Parent ID:                                       |         Points:  0.5
 Reviewer:  teor                                 |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by nickm):

 So, looking at historical migration curves for older deprecated releases,
 it seems like if we did anything that had a major effect in making people
 upgrade, the effect was fairly abrupt -- like, within the space of a week.
 So this would imply that we don't need to do a ''long'' experiment here:
 ideally, we send out a large first batch of emails, and see whether they
 have a measurable effect within a week or two.  If they do, we can email
 everybody else and wait another week or two, then deploy this patch.

 (I'd suggest maybe doing some kind of a randomized trial here, if you have
 the time and energy.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32672#comment:30>
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