Test for record rpc.

diff --git a/extensions/.record-rpc-test b/extensions/.record-rpc-test
new file mode 100755 (executable)
index 0000000..4ff9fe2
--- /dev/null
+++ b/extensions/.record-rpc-test
@@ -0,0 +1,3 @@
+#! /bin/sh
+# True if record rpc is applied.
+[ -f $KERNEL_DIR/net/ipv4/netfilter/ipt_record_rpc.c ] && echo record_rpc