Implement use of Public Suffix List.
ADD: prefix check for domains against database
ADD: more advanced domain name verification (public suffix, punycode)
fix: cleanup public suffix list-initailizing.
Add: link for client certificate login
ADD: #1334: Show the name of current user.
UPD: change names for Cert/Pass login.
add: 403-page, custom 404-message
add: test 403/404-Behavior for TTP-admin page