Add newsflash relating to recent FreeBSD Infrastructure Security alert.

Approved by:	core, so (simon, blanket)

share/xml/news.xml

@@ -33,6 +33,22 @@
     <month>
       <name>11</name>
 
+      <day>
+	<name>17</name>
+
+	<event>
+	  <title>Security Incident on FreeBSD Infrastructure</title>
+
+	  <p>On Sunday 11th of November, an intrusion was detected on
+	    two machines within the FreeBSD.org cluster. We have found
+	    no evidence of any modifications that would put any end user
+	    at risk. However, we do urge all users to read the report
+	    available at <a href="/news/2012-compromise.html">
+	      http://www.freebsd.org/news/2012-compromise.html</a> and
+	    decide on any required actions themselves.</p>
+	</event>
+      </day>
+
       <day>
 	<name>5</name>