s3:smb: include "smbXsrv.h" before "vfs.h"

This is still needed as long as smbXsrv_open/_tcon are referenced
in files_struct and connection_struct respectively. Eventually,
these structures should not have a backlink to the smb world any more.

source3/include/smb.h

@@ -154,6 +154,12 @@ struct sys_notify_context {
 /* Include VFS stuff */
 
 #include "smb_acls.h"
+/*
+ * smbXsrv.h: currently needed for vfs.h, as long as
+ * the smbXsrv structures are still referenced as a
+ * backling from files_struct and connection_struct.
+ */
+#include "librpc/gen_ndr/smbXsrv.h"
 #include "vfs.h"
 
 struct current_user {