server: Add a simple mapping from Unix uids to NT SIDs.
diff --git a/server/security.h b/server/security.h
index 88b437d..74ff2bb 100644
--- a/server/security.h
+++ b/server/security.h
@@ -55,6 +55,7 @@
extern const SID *token_get_primary_group( struct token *token );
extern void security_set_thread_token( struct thread *thread, obj_handle_t handle );
+extern const SID *security_unix_uid_to_sid( uid_t uid );
extern int check_object_access( struct object *obj, unsigned int *access );
static inline int thread_single_check_privilege( struct thread *thread, const LUID *priv)