[Buildbot] #3579: twisted 16.3.0 breaks buildbot's websockets

[Buildbot trac]

#3579: twisted 16.3.0 breaks buildbot's websockets
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Reporter:  tardyp  |      Owner:
    Type:  defect  |     Status:  new
Priority:  major   |  Milestone:  0.9.0
 Version:  master  |   Keywords:
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 Since twisted 16.3.0, buildbot's websocket ceased to function.

 after bisect, it looks like related to commit
 2d39ccad9d8a9b86229dd7fb1ce47ca841b730be from twisted
 which is related to this comment in release note:

 Deprecations and Removals

 twisted.web would previously dispatch pipelined requests simultaneously
 and queue the responses. This behaviour did not enforce any of the
 guarantees required by RFC 7230 or make it possible for users to enforce
 those requirements. For this reason, the parallel dispatch of requests has
 been removed. Pipelined requests are now processed serially. (#8320)

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Ticket URL: <http://trac.buildbot.net/ticket/3579>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation