[release-notes] Add admonition about iptables

[John J. McDonough]

commit 64da024c7a06908574b9782f7e4fe505418194dc
Author: John J. McDonough <jjmcd at fedoraproject.org>
Date:   Wed Mar 21 15:53:27 2012 -0400

    Add admonition about iptables

 en-US/Security.xml |   31 ++++++++++++++++++++-----------
 1 files changed, 20 insertions(+), 11 deletions(-)
---
diff --git a/en-US/Security.xml b/en-US/Security.xml
index 4357010..32656fb 100644
--- a/en-US/Security.xml
+++ b/en-US/Security.xml
@@ -66,19 +66,28 @@
            of the answer. 
      </para>
      <para>
-         The <application>iptables</application> and 
-         <application>ip6tables</application> services will not be enabled 
-         by default anymore. The required changes in the init scripts are 
-         simple. system-config-firewall will not be installed by default 
-         anymore, but <application>firewalld</application> with the user land tools will be installed 
-         by default. The needed changes in comps are simple. 
+       <important>
+	 <title>iptables will no longer be enabled by default</title>
+	 <para>
+	   The <application>iptables</application> and
+	   <application>ip6tables</application> services will not be
+	   enabled by default anymore. The required changes in the
+	   init scripts are
+	   simple. <application>system-config-firewall</application>
+	   will not be installed by default anymore, but
+	   <application>firewalld</application> with the user land
+	   tools will be installed by default. The needed changes in
+	   comps are simple.
+	 </para>
+       </important>
      </para>
      <para>
-         Services which are adding firewall rules directly with iptables 
-         commands need to be changed to benefit from <application>firewalld</application>. 
-         These are: libvirtd, <application>NetworkManager</application>, 
-         <application>system-config-printer</application>, 
-         <application>gnome printer settings</application>. 
+         Services which are adding firewall rules directly with
+         iptables commands need to be changed to benefit from
+         <application>firewalld</application>.  These are: libvirtd,
+         <application>NetworkManager</application>,
+         <application>system-config-printer</application>,
+         <application>gnome printer settings</application>.
      </para>
      <para>
          An explicit transition is planned after Fedora 18 with dropping