patch to add a missing interface in the sysnetwork module

This patch adds a new interface to the sysnetwork module so
that the DHCP client state directories can be searched.

policy/modules/system/sysnetwork.if

@@ -213,6 +213,26 @@ interface(`sysnet_rw_dhcp_config',`
 	allow $1 dhcp_etc_t:file rw_file_perms;
 ')
 
+########################################
+## <summary>
+##      Search the DHCP client state
+##      directories.
+## </summary>
+## <param name="domain">
+##      <summary>
+##      Domain allowed access.
+##      </summary>
+## </param>
+#
+interface(`sysnet_search_dhcpc_state',`
+	gen_require(`
+		type dhcpc_state_t;
+	')
+
+	files_search_var_lib($1)
+	allow $1 dhcpc_state_t:dir search_dir_perms;
+')
+
 ########################################
 ## <summary>
 ##	Read dhcp client state files.