[tor-bugs] #30998 [Circumvention/Snowflake]: Some connections to the snowflake bridge from proxies are failing

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#30998: Some connections to the snowflake bridge from proxies are failing
-----------------------------------------+--------------------
     Reporter:  cohosh                   |      Owner:  (none)
         Type:  defect                   |     Status:  new
     Priority:  Immediate                |  Milestone:
    Component:  Circumvention/Snowflake  |    Version:
     Severity:  Normal                   |   Keywords:
Actual Points:                           |  Parent ID:
       Points:                           |   Reviewer:
      Sponsor:                           |
-----------------------------------------+--------------------
 Noticed this while testing out some new webextension changes.

 I get the following errors:
 {{{
 Snowflake: WebRTC DataChannel opened! snowflake.js:1154:13
 Firefox can’t establish a connection to the server at
 wss://snowflake.bamsoftware.com/?client_ip=45.72.156.47.
 snowflake.js:1090:11
 Snowflake: websocket-relay error. snowflake.js:1154:13
 Snowflake: websocket-relay closed.
 }}}

 This are reproducible with a clean master branch.

 I'm also getting several bootstraps to 10% during my client tests that
 aren't going through my proxy so I'm guessing others are having the same
 problem.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30998>
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