How to send the following type of custom modified message stanzas in Tsung?
<message from='91_9999111001@localhost/tsung' to='91_9999111000@localhost' id='12' type='chat'>
<custom_element attr1="val1"></custom_element>
</message>
The idea is the sender and receiver must be chosen by Tsung as usual but the <body> is removed and <custom_element> is added dynamically.
