[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2277: upgrade buildbot to 0.8.9

[Tahoe-LAFS]

#2277: upgrade buildbot to 0.8.9
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 Reporter:  zooko               |          Owner:
     Type:  enhancement         |         Status:  new
 Priority:  normal              |      Milestone:  undecided
Component:  dev-infrastructure  |        Version:  1.10.0
 Keywords:  buildbot            |  Launchpad Bug:
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 Looks like some good bugfixes and features:

 http://docs.buildbot.net/0.8.9/relnotes/index.html

 It looks like there might be some incompatible changes that we would have
 to account for.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2277>
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