[Bug 1796979]

[Rex]

Created attachment 9040503
ZIP file of HTTP logs, success at reaching google.com, fail at reaching bing.com

These logs were produced using the plain 66.0a1 firefox with
MOZ_LOG=timestamp,GetAddrInfo:5. Firefox successfully resolved
google.com, but failed to resolve bing.com

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https://bugs.launchpad.net/bugs/1796979

Title:
  Intermittently can't connect to the server

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