Fix unauth-psql.yaml false positive

Fix unauth-psql.yaml giving false positive results when the request is
reflected in the HTTP/FTP response.

network/misconfig/unauth-psql.yaml

@@ -26,6 +26,7 @@ tcp:
       - "{{Hostname}}"
       - "{{Host}}:5432"
 
+    matchers-condition: and
     matchers:
       - type: word
         part: raw
@@ -34,3 +35,10 @@ tcp:
           - "Locale Provider"
           - "Owner"
         condition: and
+
+      - type: word
+        words:
+          - "FTP"
+          - "HTTP"
+        condition: or
+        negative: true