just to be sure that people know you can't comment them out. You have to remove them.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12049 d0543943-73ff-0310-b7d9-9358b9ac24b2

conf/vars.xml

   <!-- Preprocessor Variables
        These are introduced when configuration strings must be consistent across modules. 
+       NOTICE: YOU CAN NOT COMMENT OUT AN X-PRE-PROCESS line, Remove the line instead.
    -->
   <X-PRE-PROCESS cmd="set" data="sound_prefix=$${base_dir}/sounds/en/us/callie"/>
   <!--