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

* The previous XPATH imlementation was very restricted.
  * The only function implemented is the Yang extension "current()". No other functions are implemented (eg last(), count()).

test/test_yang.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# Test4: Yang specifics: multi-keys and empty type
+# Yang specifics: multi-keys and empty type
 APPNAME=example
 # include err() and new() functions and creates $dir
 . ./lib.sh