Patch for review

[Simo Sorce]

We discussed about a problem with alias creation and ldapsam.
While I think that winbind should create the alias itself I found the
patch to do it would have been too big currently, so I opted for a
different approach trying to fix just what does not work within the
current framework.

This means making ldapsam group mapping understand aliases are a special
case.

Comments?

Simo.

-- 
Simo Sorce    -  idra at samba.org
Samba Team    -  http://www.samba.org
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