Enhance fakecurl to cope with the resetting of cURL options
Fix for consistent NULL checking
Merge pull request #420 from Metaswitch/curl_fixes

[Reviewer: Ellie] Enhance fakecurl to cope with the resetting of cURL options
Add header name
Send different responses depending on http code
Fix module update
Add custom header type and related functions
Unit test utility functions
Merge pull request #421 from Metaswitch/iss286

[Reviewer: Rob] Iss286
Take pjsip change
Take fixed up pjsip
Add unit test
Fix up memory leak in UT
Set Session-Expiry to configured value
Fix up UT infrastructure
Add UT of header addition
Add init.d function
Markups
Merge pull request #423 from Metaswitch/session-expires

Reviewer Mike - Session expires
Fix failing UT thanks to mis-markup