Move federation traffic from port 8448 to 443 as a default

[turt2live]

per #1576 (comment)

[nisbet-hubbard]

443 is also required on homeservers behind Cloudflare (which doesn’t offer 8448 on free tier), currently achieved through .well-known delegation.

[6543]

as #1576 is registered 🎉
and I know that large scale installation can benefit from c2s and s2s trafic seperation ... I think we should not deprecate it, instead support both (smal install on same port, bit install do seperate trafic)

so about the "default" port I dont know, I think the spec should handle them equaly and the server implementation should decide what there best default value is