Replacing remaining badrequest() with proper restconf error msg.

lib/clixon/clixon_netconf_lib.h

@@ -61,5 +61,6 @@ int netconf_operation_not_supported(cbuf *cb, char *type, char *message);
 int netconf_operation_failed(cbuf *cb, char *type, char *message);
 int netconf_operation_failed_xml(cxobj **xret, char *type, char *message);
 int netconf_malformed_message(cbuf *cb, char *message);
+int netconf_malformed_message_xml(cxobj **xret, char *message);
 
 #endif /* _CLIXON_NETCONF_LIB_H */

lib/clixon/clixon_options.h

@@ -49,10 +49,16 @@
  */
 
 /*! Controls how keywords a generated in CLI syntax / prints from object model
- * Example syntax a.b[] $!x $y:
- * NONE: a b <x> <y>;
- * VARS: a b <x> y <y>;
- * ALL:  a b x <x> y <y>;
+ * Example YANG: 
+ *  list a {a.b[] $!x $y:
+ *  list a {
+ *    key x;
+ *    leaf x;   
+ *    leaf y;   
+ *  }
+ * NONE: a <x> <y>;
+ * VARS: a <x> y <y>;
+ * ALL:  a x <x> y <y>;
  */
 enum genmodel_type{
     GT_ERR =-1, /* Error  */

lib/clixon/clixon_yang.h

@@ -31,6 +31,9 @@
 
   ***** END LICENSE BLOCK *****
 
+ * Yang functions
+ * @see https://tools.ietf.org/html/rfc6020 YANG 1.0
+ * @see https://tools.ietf.org/html/rfc7950 YANG 1.1
  */
 
 #ifndef _CLIXON_YANG_H_