syncing 2.3.0

src/include/native2amiga_api.h

+/*
+ * The following functions do exactly the same thing as their
+ * Amiga counterpart, but can be called in situation where calling
+ * the exec.library functions is impossible.
+ */
+#ifdef SUPPORT_THREADS
+void uae_Cause(uaecptr interrupt);
+void uae_ReplyMsg(uaecptr msg);
+void uae_PutMsg(uaecptr port, uaecptr msg);
+void uae_Signal(uaecptr task, uae_u32 mask);
+void uae_NotificationHack(uaecptr, uaecptr);
+#endif
+void uae_NewList(uaecptr list);
+int native2amiga_isfree (void);
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