escape the comma as this sets PCMA to zero intead of the expected results.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@9477 d0543943-73ff-0310-b7d9-9358b9ac24b2

conf/dialplan/extensions/tollfreegateway.com.noload

 <include>
   <extension name="tollfreegateway.com">
     <condition field="destination_number" expression="^1?(8(00|55|66|77|88)[2-9]\d{6})$">
-      <action application="bridge" data="{absolute_codec_string=PCMU,PCMA}sofia/${use_profile}/9313371$1@sip.tollfreegateway.com"/>
+      <action application="bridge" data="{absolute_codec_string=PCMU\,PCMA}sofia/${use_profile}/9313371$1@sip.tollfreegateway.com"/>
     </condition>
   </extension>
 </include>