[tor-bugs] #21774 [Core Tor/Stem]: Fix CONN_BW event listening

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#21774: Fix CONN_BW event listening
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     Reporter:  timonh         |      Owner:  atagar
         Type:  defect         |     Status:  new
     Priority:  Low            |  Milestone:
    Component:  Core Tor/Stem  |    Version:
     Severity:  Normal         |   Keywords:
Actual Points:                 |  Parent ID:
       Points:                 |   Reviewer:
      Sponsor:                 |
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 The ConnectionBandwidthEvent overwrites the type field of the Event class.
 Therefore the method _handle_event in control.py erroneously checks if the
 connection type (if it is a ConnectionBandwidthEvent) is contained in the
 event listeners list.
 All in all you can't receive CONN_BW events in stem.
 I fixed it by renaming the type of the ConnectionBandwidthEvent to
 conn_type.

 My changes can be found here:
 https://github.com/kithack/stem/commit/23fe7b6cbd69c6209657c9531a21502a67ecf5e5

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21774>
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