Key name now begin with a capital letters instead of using the '@' character.
Also, '-' character are removed from  a composite name.
This is introduce the very first change of the key field.
Some simplications and changes to the key name will be made.
Add the  get_enum_list() function.

This reverts commit 87bd69c6.

Reduce use of HEAP memory with
the stack_xxx functions familly.
Switch to the new lexer algorithm.
Fix the parse of the @runas key.