selftest: Remove dns_host_file every time we start

diff --git a/selftest/selftest.pl b/selftest/selftest.pl
index f5342635e090c62cd95283b4e6ed781ad35ba4fb..7bbad62bbf8f2cb520d5c6ff6af193855495be61 100755 (executable)
--- a/selftest/selftest.pl
+++ b/selftest/selftest.pl
@@ -853,6 +853,9 @@ sub teardown_env($)
        delete $running_envs{$envname};
 }
 
+# This 'global' file needs to be empty when we start
+unlink("$prefix_abs/dns_host_file");
+
 if ($opt_no_lazy_setup) {
        setup_env($_) foreach (keys %required_envs);
 }