SIPp mac和debian用法可能略有差别

<ereg regexp="<(.*)>" search_in="hdr" header="Contact:" check_it="true" assign_to="dummy,remote_contact"/>

debian没事,但mac报错

`<`变`&lt`

'>'变`&gt`

就都冇问题了

https://github.com/SIPp/sipp/issues/414