[INCLUDE][WINLOGON] Rename the STARTF_SCRNSAVER flag to STARTF_SCREENSAVER,

as documented in "Advanced Windows NT" by Jeffrey M. Richter (Microsoft Press),
and in https://is.muni.cz/el/1433/jaro2010/PB167/um/cv5/undocumented_CreateProcess.pdf .

[INCLUDE][SERVICES][WIN32K:NTUSER] Add an undocumented STARTF_INHERITDESKTOP flag
for the STARTUPINFO::dwFlags structure member, whose purpose is to tell Win32k
that the created handles to the window station and desktop to which the
process is connecting to, can be inherited by its child processes.
It is used when starting interactive services.
Observed via API monitoring on Windows 2003.

base/system/services/database.c

@@ -17,6 +17,8 @@
 #include <userenv.h>
 #include <strsafe.h>
 
+#include <reactos/undocuser.h>
+
 #define NDEBUG
 #include <debug.h>
 
@@ -1674,6 +1676,7 @@ ScmStartUserModeService(PSERVICE Service,
     if ((NoInteractiveServices == 0) &&
         (Service->Status.dwServiceType & SERVICE_INTERACTIVE_PROCESS))
     {
+        StartupInfo.dwFlags |= STARTF_INHERITDESKTOP;
         StartupInfo.lpDesktop = L"WinSta0\\Default";
     }