[tor-bugs] #1912 [- Select a component]: Choosing bridges by bw is problematic

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#1912: Choosing bridges by bw is problematic
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 Reporter:  Sebastian             |       Owner:     
     Type:  defect                |      Status:  new
 Priority:  normal                |   Milestone:     
Component:  - Select a component  |     Version:     
 Keywords:                        |      Parent:     
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 We currently choose bridges by bw according to their advertised bw
 capacity. This leads to fun bugs, for example: Use just one bridge with
 capacity 0, bug #1805 is triggered but things work. Add another (working)
 bridge to the set with a capacity != 0: We never choose the bridge with
 capacity 0. Make the bridge with capacity != 0 nonworking: The Tor client
 breaks, because it wants to use the bridge with capacity. It doesn't try
 the other bridge, because it has a weight of 0.

 This means two things: new bridges don't get usage as quickly as they
 could, because people won't choose them after starting up, and that one of
 two in-theory working bridges gets blocked, we might not try the one that
 is still good.

 One obvious solution would be to just not weight bridges. I think that's
 probably the sanest choice for situations where some of your bridges will
 frequently be blocked, and others might not be - we don't really want to
 keep picking the non-working bridge more than we need to. Not sure if that
 has other unwanted side-effects though.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/1912>
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