[Buildbot] #2644: Add more MQ backends

[Buildbot trac]

#2644: Add more MQ backends
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Reporter:  dustin       |       Owner:
    Type:  enhancement  |      Status:  new
Priority:  critical     |   Milestone:  0.9.+
 Version:               |  Resolution:
Keywords:  mq           |
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Changes (by dustin):

 * milestone:  0.9.0 => 0.9.+


Comment:

 Now that we have crossbar.io support, no, this is not a 0.9.0 blocker.

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Ticket URL: <http://trac.buildbot.net/ticket/2644#comment:7>
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