Add reference to the latest trademark policy on digium.com

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@42555 65c4cc65-6c06-0410-ace0-fbb531ad65f3

LICENSE

@@ -38,7 +38,8 @@ and use of them is subject to our trademark licensing policies. If you
 wish to use these trademarks for purposes other than simple
 redistribution of Asterisk source code obtained from Digium, you
 should contact our licensing department to determine the necessary
-steps you must take.
+steps you must take. For more information on this policy, please read
+http://www.digium.com/en/company/profile/trademarkpolicy.php
 
 If you have any questions regarding our licensing policy, please
 contact us:

README

@@ -1,4 +1,4 @@
-The Asterisk Open Source PBX
+The Asterisk(R) Open Source PBX
 by Mark Spencer <markster@digium.com>
 and the Asterisk.org developer community
 
@@ -247,3 +247,6 @@ you're interested in getting more information.
   Welcome to the growing worldwide community of Asterisk users!
 
 Mark Spencer
+
+----
+Asterisk is a trademark belonging to Digium, inc