Update recursor dnssec docs

diff --git a/docs/markdown/recursor/dnssec.md b/docs/markdown/recursor/dnssec.md
index 810e2e5ba1e1c0ec7165befe0f7aae49de0a39dc..97a322e8e83c58192c530b343a3d3b465c572a56 100644 (file)
--- a/docs/markdown/recursor/dnssec.md
+++ b/docs/markdown/recursor/dnssec.md
@@ -148,5 +148,5 @@ $ rec_control clear-nta subdomain.example
 Removed Negative Trust Anchors for subdomain.example
 ```
 
-`clear-nta` accepts multiple domain-names and when invoked without any domain-name,
-it will remove **all** negative trust anchors.
+`clear-nta` accepts multiple domain-names and accepts '*' (beware the shell quoting)
+to remove all negative trust anchors.