Brad Fitzpatrick 8ecee476f6 ipn: simplify TestLocalLogLines, defer a Shutdown of its LocalBackend
The test's LocalBackend was not shut down (Shutdown both releases
resources and waits for its various goroutines to end). This should
fix the test race we were seeing. It definitely fixes the file
descriptor leak that preventing -race -count=500 from passing before.
2020-09-04 08:36:07 -07:00
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