Enhance doc regarding openssl s_client

Author: michaelortmann

doc/sphinx_source/using/tls.rst

@@ -139,8 +139,11 @@ new certificate to connect to Eggdrop, depends on your irc client.
 To connect to your bot from the command line, you can use the OpenSSL
 ssl client::
 
-  openssl s_client -cert my.crt -key my.key -connect host:sslport 
-    
+  openssl s_client -cert my.crt -key my.key -connect host:sslport
+
+Beware that openssl s_client is intended for testing purposes only and for
+example does not validate a bots self signed certificate.
+
 ----------------
 SSL/TLS Settings
 ----------------