Test for TCPMSS target.

diff --git a/extensions/.TCPMSS-test b/extensions/.TCPMSS-test
new file mode 100755 (executable)
index 0000000..ff0294c
--- /dev/null
+++ b/extensions/.TCPMSS-test
@@ -0,0 +1,2 @@
+#! /bin/sh
+[ -f $KERNEL_DIR/include/linux/netfilter_ipv4/ipt_TCPMSS.h ] && echo TCPMSS