Additional UKVI alias
Merge pull request #556 from rjc123/newsites

Shift HMRC to be managed by transition
Incorporate mappings from DFE pages to redirector
Configure DFE legacy subdomains to global 301 to discontinuation notice
Add aliases to DFE
Amend redirector whitelist to accommodate DFE internal mappings
Add TLD config for DFE domains
Merge pull request #557 from rjc123/newmappings

Initial configuration of DFE mappings into redirector, whitelist updates and new sites.
Add dummy timestamp for uncrawled sites
Add comment to indicate dummy status of timestamps
Merge pull request #558 from rjc123/newmappings

Add dummy timestamp for uncrawled sites