Init packet:
<init fileuri="file:///phpworks/dbgp-example.php"
    language="PHP" appid="3149" idekey="phpw">
  <engine version="2.0.0dev">Xdebug</engine>
</init>

Command layout:
[cmd] -i [tid] ..other options.. -- data

- Options always have the form: -[char] value
- The -i transaction ID option is mandatory
- Data, if available, must be base64 encoded

Status reply:
<response command="status"
    transaction_id="1" status="starting" reason="ok"/>
Statuses are: starting, running, break, stopping and stopped.
Reasons are: ok, error, aborted and exception.