Add HSSConnection::get_associated_uris method to retrieve associated URIs from homestead
Updates to use new homestead API
Don't set up P-Asserted-Identity in sprout, as bono now does this.
Determine served user from P-Asserted-Identity if P-Served-User header absent.
Tidy up comment
Add support for P-Associated-URIs header
Fix bug in parsing of P-Served-User header (doesn't work properly if URI not encoded as name-addr)
Give registrar access to HSS connection (required for associated public URI lookup)
Retire --auth parameter as we should just always use the IMS digest authentication mode
Query Associated URIs from HSS on registration
Return P-Associated-URI on response, and only store primary URI in memcached
Add P-Called-Party-Id
Switch to using /associatedpublicbypublic/ URL
Add comment explaining why we're not using the private ID (yet)
Look up AOR in memcached from first associated URI from homestead
Use To header not Request-URI when looking up public user ID
Don't register the authentication module on the edge proxy
Reset contact header list if store write fails
Remove spammy debug log
Rework identities data structures in flow object, and implement custom header parses for identity headers