[tor-bugs] #25600 [Obfuscation/Snowflake]: Running 2 instances of snowflake-client leads to the former one stopping

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#25600: Running 2 instances of snowflake-client leads to the former one stopping
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     Reporter:  cypherpunks            |      Owner:  (none)
         Type:  defect                 |     Status:  new
     Priority:  Medium                 |  Milestone:
    Component:  Obfuscation/Snowflake  |    Version:
     Severity:  Normal                 |   Keywords:
Actual Points:                         |  Parent ID:
       Points:                         |   Reviewer:
      Sponsor:                         |
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 Steps to reproduce:

 1. Use the fresh testbuilds by dcf `https://people.torproject.org/~dcf/pt-
 bundle/snowflake/20180321-8.0a4-4a5889af2891/`
 2. Start a download
 `https://mirrors.edge.kernel.org/centos/7.4.1708/isos/x86_64/CentOS-7-x86_64-Everything-1708.iso`
 and watch `about:downloads` or your Task Manager.
 3. Open another instance of `snowflake-client` (for example in Ricochet
 edit the `torrc` in `./local/share/Ricochet/ricochet/tor` with the
 relevant config).
 4. Watch the download failing, or the receiving/s in the Task Manager go
 down to 0.

 Doesn't seem to be reproducible with the earlier version of `snowflake-
 client`.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25600>
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