r9734: The ethereal parser generator was generating duplicate functions for

r9734: The ethereal parser generator was generating duplicate functions for
fields in structures with the same name as a structure (i.e
security_ace.object and security_ace_object).  I've twiddled the naming
scheme a bit and things are a bit more unique but there is still may be
some naming conflicts in other IDL files.

We are now getting confused over fields with the same name in unions
(e.g security_ace_object_ctr.object) plus some other union weirdness.
(This used to be commit c2ad9f49a204d0075a3b460c5ea2ca9741fc7125)