set this sometime before an origination (bridge etc).

<action application="set" data="propagate_vars=my_cool_var1,my_cool_var2,foo,bar"/>

and they should be cloned over to the new channel when it's substantiated



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3101 d0543943-73ff-0310-b7d9-9358b9ac24b2