Initial AKA changes
Implement AV store for AKA
More AKA code
Fixes to get Digest authentication working
Add support for the autn parameter
AuthVector store implemented on top of memcachedstore
Remove obsolete headers
Merge dev in to aka branch
UT fixes
Fix merge issue
UT compile issues
Fix up unit tests
Fixes to get AKA working with SIPp
AKA fixes and unit tests
Authentication module fixes and UT to 100%
Fix stale challenge response handling
Fix S-CSCF policy for selecting authentication algorithm
Fix merge issues
Merge issues
Fix up UT build failures after merge