Fix S1000 linter warnings

I don't know enough about go to correctly fix the two golangci-lint warnings

[
   {
      "description":"gosimple: S1000: should use for range instead of for { select {} }",
      "severity":"critical",
      "fingerprint":"DA4039481078286C37BBD96815CCF814",
      "location":{
         "path":"debughandler_unix.go",
         "lines":{
            "begin":58
         }
      }
   },
   {
      "description":"gosimple: S1000: should use for range instead of for { select {} }",
      "severity":"critical",
      "fingerprint":"0353B1C4953C7113A61A2442411E91D1",
      "location":{
         "path":"dns_utils.go",
         "lines":{
            "begin":133
         }
      }
   }
]