Re-add a code comment to the "hooks" system test

Commit da74157440e02bd52e0abe6036e4e9ec7316ebd2 removed a useful code
comment from the "hooks" system test.  Add it back to prevent confusion.

diff --git a/bin/tests/system/hooks/tests_async_plugin.py b/bin/tests/system/hooks/tests_async_plugin.py
index 48f9feefbdfc3d60f5d28b7a0651d94f57946cc6..2f42e273790cab14fe3d1e71ccba7493ba6ef07f 100644 (file)
--- a/bin/tests/system/hooks/tests_async_plugin.py
+++ b/bin/tests/system/hooks/tests_async_plugin.py
@@ -23,4 +23,5 @@ def test_async_hook(named_port):
         "A",
     )
     ans = dns.query.udp(msg, "10.53.0.1", timeout=10, port=named_port)
+    # the test-async plugin changes the status of any positive answer to NOTIMP
     assert ans.rcode() == dns.rcode.NOTIMP