kernel: replace kern_handle_duplicate with the more powerful kern_handle_transfer

this syscall can move and copy handles within the current task, or from/to
other tasks

include/kernel/syscall.h

@@ -143,9 +143,13 @@ extern kern_status_t sys_address_space_release(
 
 extern kern_status_t sys_kern_log(const char *s);
 extern kern_status_t sys_kern_handle_close(kern_handle_t handle);
-extern kern_status_t sys_kern_handle_duplicate(
-	kern_handle_t handle,
-	kern_handle_t *out);
+extern kern_status_t sys_kern_handle_transfer(
+	kern_handle_t src_task_handle,
+	kern_handle_t src_handle,
+	kern_handle_t dest_task_handle,
+	kern_handle_t dest_handle,
+	unsigned int mode,
+	kern_handle_t *out_handle);
 extern kern_status_t sys_kern_config_get(
 	kern_config_key_t key,
 	void *ptr,