Fix multiple domain support - still need to fix default domain and authentication
Handling some more uses of default home domain
Don't fix up request URIs when forwarding upstream - it's simply wrong to do so
icid-generated-at should be a node-unique identifier
Default P-Visited-Network-Id sensibly
Fix build and UT.
Fix options parsing
Live test fixes
Support any realm that the HSS gives us
Merge pull request #487 from Metaswitch/issue465

[Reviewer: Mike] Support any realm that the HSS gives us
UT for checking realms
Code review mark-ups
Code review mark-up
Merge remote-tracking branch 'origin/sto714' into dev

Conflicts:
	sprout/authentication.cpp