NETLOGON update.

NETLOGON update.
Changed the name of SAM_ACCOUNT_INFO to the real name : DELTA_USER
also fixed some bugs in this structure. Surprised that ethereal could
dissect this structure at all previously since the structure description was
broken. Pure luck I guess.
Other implementors of NETLOGON would benefit from looking at ethereal source
in the future since it seems the public IDL definitions for this interface is
very buggy.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@5823 f5534014-38df-0310-8fa8-9805f1628bb7