NULL-terminate the value of the P-Served-User header to comply with pjsip_parse_uri.
Debug logging for served user extraction
Improve logging of URI and local host comparison
Fix typo and off-by-one error
Add test to reproduce crash due to P-Charging-Vector header.
Correct the req URI
Further ReqURI tweaks
Whitespace tweaks
Code review feedback: reducing log spam
Update comment
Removing debug logs from the most frequently-hit code paths
Merge pull request #304 from Metaswitch/p_served_user

[Reviewer: Matt] P-Served-User