- Disabled xpath optimization for hierarchical list

- Made cli show xpath command more capable

include/clixon_custom.h

@@ -61,6 +61,7 @@
 /*! Optimize special list key searches in XPATH finds
  * Identify xpaths that search for exactly a list key, eg: "y[k=3]" and then call
  * binary search. This only works if "y" has proper yang binding and is sorted by system
+ * Dont optimize on "hierarchical" lists such as: a/b/y[k=3], where a or b is another list.
  */
 #define XPATH_LIST_OPTIMIZE