Implemented RtlCreateUserThread, and use it to move thread creation to
ntdll.
diff --git a/include/winbase.h b/include/winbase.h
index 2f6c2f4..56177f0 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -589,6 +589,7 @@
#define CREATE_UNICODE_ENVIRONMENT 0x00000400
#define CREATE_SEPARATE_WOW_VDM 0x00000800
#define CREATE_SHARED_WOW_VDM 0x00001000
+#define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
#define CREATE_DEFAULT_ERROR_MODE 0x04000000
#define CREATE_NO_WINDOW 0x08000000
#define PROFILE_USER 0x10000000