Commits on Nov 17, 2017

1. txt parser: fix goroutine leak …

   When a higher level (grammar or syntax) error was encountered the lower
   level zlexer routine would be left open and trying to send more tokens
   on the channel c. This leaks a goroutine, per failed parse...
   
   This PR fixes this by signalling this error - by canceling a context -
   retrieving any remaining items from the channel, so zlexer can return.
   
   It also adds a goroutine leak test that can be re-used in other tests,
   the TestParseBadNAPTR test uses this leak detector.
   
   The private key parsing code had the same bug and is also fixed in this
   PR.
   
   Fixes #586
   Fixes coredns/coredns#1233

   

   miekg committed Nov 17, 2017
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2. sem not needed anymore

   

   miekg committed Nov 17, 2017
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   30c3c85 View commit details

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