backport from trunk (rev #9766 + #9775):
- fixed memory coruption when using siptrace diversion to homer via HEP protocol :
   - avoid changing fromip and toip strings in pipport2su (to avoid corruption of socket names or segfault when trying to change a static string in data segment
   - the static default string includes now port also (to avoid errors in pipport2su).
   Many thanks to Seth Schultz for reporting and help in troubleshooting