danetool: corrected typo in manual [ci skip]

diff --git a/src/danetool-args.def b/src/danetool-args.def
index 7e4c229e5f64058e350eeed704d8a5cc0d8089fd..0f55023fad23d3a6fdac0d55e6e07adaf4c983b4 100644 (file)
--- a/src/danetool-args.def
+++ b/src/danetool-args.def
@@ -99,7 +99,7 @@ flag = {
     name      = starttls-proto;
     descrip   = "The application protocol to be used to obtain the server's certificate (https, ftp, smtp, imap, ldap, xmpp)";
     arg-type  = string;
-    doc = "When the server's certificate isn't provided danetool will connect to the server to obtain the certificate. In that case it is required to known the protocol to talk with the server prior to initiating the TLS handshake.";
+    doc = "When the server's certificate isn't provided danetool will connect to the server to obtain the certificate. In that case it is required to know the protocol to talk with the server prior to initiating the TLS handshake.";
 };
 
 flag = {