SM and winlogon

[ea]

What if winlogon.exe is run by csrss.exe and not by smss.exe?
A winlogon process, in its own desktop, is needed for each Win32 session.
If we make csrss.exe multiuser, it must create session 0 (console) or 
die and therefore run winlogon in it.
This change shouldn't have any effect on compatibility with Windows NT.
smss will assume only csrss is critical.
ea