create SECURITY.md

The security policy is that nothing is supported.

SECURITY.md

@@ -0,0 +1,14 @@
+# Security Policy
+
+## Supported Versions
+
+**ALL IOCCC ENTRY CODE IS UNSUPPORTED!!**
+
+Use code in this repo at your own risk!  We will **NOT** provide security updates to any IOCCC entry code!
+
+## Reporting a Vulnerability
+
+Even though **ALL IOCCC ENTRY CODE IS UNSUPPORTED**,
+if you wish to discuss a security concen regarding this repo then
+please **send email the IOCCC judges** by consulting the bottom section
+of the "[How to contact the IOCCC](https://www.ioccc.org/contact.html)" web page.