Document r280930, several RPC fixes.

Add MIT AI Lab to sponsors.ent.

Sponsored by:	The FreeBSD Foundation

release/doc/en_US.ISO8859-1/relnotes/article.xml

@@ -567,6 +567,26 @@
       <para revision="272089">A bug in &man.ipfw.4; that could
 	potentially lead to a kernel panic when using &man.dummynet.4;
 	at layer 2 has been fixed.</para>
+
+      <para revision="280930" contrib="sponsor" sponsor="&mitail;">The
+	kernel <acronym>RPC</acronym> has been updated to include
+	several enhancements:</para>
+
+      <itemizedlist>
+	<listitem>
+	  <para>The 45 MiB limit on requests queued for
+	    &man.nfsd.8; threads has been removed.</para>
+	</listitem>
+
+	<listitem>
+	  <para>Avoids unecessary throttling by not deferring
+	    accounting for completed requests.</para>
+	</listitem>
+
+	<listitem>
+	  <para>Fixes an integer overflow and signedness bugs.</para>
+	</listitem>
+      </itemizedlist>
     </sect2>
 
     <sect2 xml:id="kernel-config">

release/doc/share/xml/sponsor.ent

@@ -30,6 +30,8 @@
 <!ENTITY limelight	"Limelight Networks">
 <!ENTITY lsi		"LSI">
 
+<!ENTITY mitail		"MIT Computer Science &amp; Artificial Intelligence Laboratory">
+
 <!ENTITY netgate	"Netgate">
 
 <!ENTITY sandvine	"Sandvine, Inc.">