Introduce kernel_delete_unlabeled_sockets

The kernel_delete_unlabeled_sockets interface is called by the
(deprecated) files_delete_isid_type_sock_files interface in
kernel/files.if.

Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>

policy/modules/kernel/kernel.if

@@ -2852,6 +2852,23 @@ interface(`kernel_relabelfrom_unlabeled_sockets',`
 	allow $1 unlabeled_t:sock_file { getattr relabelfrom };
 ')
 
+########################################
+## <summary>
+##	Delete unlabeled named sockets.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`kernel_delete_unlabeled_sockets',`
+	gen_require(`
+		type unlabeled_t;
+	')
+
+	delete_sock_files_pattern($1, unlabeled_t, unlabeled_t)
+')
 ########################################
 ## <summary>
 ##	Send and receive messages from an