I've implemented Use only nick as handle if nick and domain is the same · sorenpeter/timeline@8c12444

See it live at:

• nick = domain: https://darch.dk/timeline/profile?url=https://eapl.me/tw.txt
• nick ≠ domain: https://darch.dk/timeline/profile?url=https://twtxt.net/user/prologic/twtxt.txt
• no nick, use domain: https://darch.dk/timeline/profile?url=https://akkartik.name/twtxt.txt

I'm not sure I like the leading @ thou...