SSL: check for SSL, not specific protocols

Code cleanup to check less for protocols and more for the specific
relevant feature. Like if SSL is required.

lib/ldap.c

@@ -206,7 +206,7 @@ static CURLcode Curl_ldap(struct connectdata *conn, bool *done)
   }
 
   /* Get the URL scheme ( either ldap or ldaps ) */
-  if(conn->given->protocol & CURLPROTO_LDAPS)
+  if(conn->given->flags & PROTOPT_SSL)
     ldap_ssl = 1;
   infof(data, "LDAP local: trying to establish %s connection\n",
           ldap_ssl ? "encrypted" : "cleartext");