fix typo (ya ya very funny)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4040 d0543943-73ff-0310-b7d9-9358b9ac24b2

conf/freeswitch.xml

@@ -15,7 +15,7 @@
 
   <!--#set "domain=mydomain.com"-->
   <!--#set "subdomain=sub.mydomain.com"-->
-  <!--#set "default_codecs=PCUM@20i"-->
+  <!--#set "default_codecs=PCMU@20i"-->
   <!--my domain is $${domain}-->
   <section name="configuration" description="Various Configuration">
     <!--#include "switch.conf.xml"-->