The parser confuses <> in attribute value as a tag

[ghost]

With xml scenario contains an assignstr element like that:

  <nop>
    <action>
      <assignstr assign_to="dummy" value="Alice <sip:[email protected]>"/>
    </action>
  </nop>

The SIPp shows error:

Unexpected </action> (expected </assignstr>)
2023-11-26	15:09:54.629523	1700986194.629523: Invalid XML in scenario
2023-11-26	15:09:54.629523	1700986194.629523: Invalid XML in scenario

Via debugging, I saw that the <sip:[email protected]> is parsed as an element, then the "/>" is used for closing this element instead of the assignstr.

[wdoekes]

See #414 . Should be closed by #725 and #721