Manually handle the NETLOGON_SAM_LOGON_REQUEST too.

Manually handle the NETLOGON_SAM_LOGON_REQUEST too.

With the sid structure being both optional and aligned, it was too
hard to do this in just IDL.

This requried moving some things around, as otherwise we would have a
dependency loop.

Andrew Bartlett
(This used to be commit e28790ba4884277f310be1b8bd3fba4fd47dbbdb)