* Much better support for XPATH 1.0 according to https://www.w3.org/TR/xpath-10 using yacc/lex

* NOTE: Due to an error in the previous implementation, all XPATH calls on the form `x[a=str]` where `str` is a string (not a number or XML symbol), must be changed to: `x[a='str'] or x[a="str"]`
    * This includes all calls to `xpath_vec, xpath_first`, etc.
    * All calls to cli_copy_config in CLI spec files must replace 2nd argument from `x[%s=%s]` to `x[%s='%s']`
  * The old API is stillenabled. To define the new, define XPATH_USE_NEW in include/clixon_custom.h and recompile

apps/cli/cli_generate.c

@@ -285,7 +285,7 @@ yang2cli_var_sub(clicon_handle h,
 		    goto done;
 		}
 	}
-	cprintf(cb, "%s]", r);
+	cprintf(cb, "%s]", r); /* range */
 	free(r);
 	r = NULL;
     }