r8167: - use the same algorithm than w2k3 for 'unique' pointer values

r8167: - use the same algorithm than w2k3 for 'unique' pointer values

- add a new 'sptr' (simple-full) pointer type to simulate what we need to support pipes
  like epmapper and mgmt that uses 'ptr' full pointer in their spec

- I runned make test and test_w2k3.sh with this, all fine

does we have any other pipe using 'unique' pointer where we need 'ptr'?

btw: jelmer, what does 'ignore' pointers do? they are allowed in pidl but not implemented!

metze
(This used to be commit d19068bfb2e3ff5d88bc3b76d5cef93417c7f218)