Change checker to allow integration test coverage

* Add realMain() to allow a call with test argument redacted.
 * Add main_test to call realMain with arguments after `--`.

cmd/csaf_checker/main_test.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"os"
+	"testing"
+)
+
+// call realMain() with Args that skip over params used by "go test"
+// allow calls like
+//   go test -c -vet=off -covermode=atomic  -o app.debug
+//  ./app.debug -test.coverprofile=functest.cov -- --insecure localhost
+func TestMain(t *testing.T) {
+	var endOfTestParams int
+	for i, a := range os.Args[1:] {
+		if a == "--" {
+			endOfTestParams = i + 1
+		}
+	}
+
+	realMain(os.Args[endOfTestParams+1:])
+}