The first link is into a dangerous area of the site---it's nothing but
redirects. Redirect, redirect, redirects, for the rest of time, or until
you stop the client, or if the client has code to handle it, after a preset
number of redirects it will give up.
I can't tell you the number of redirects until the client is supposed to
give up, but I do recall that RFC-2068 (early HTTP/1.1 specification),
section 10.3 stated:
A user agent SHOULD NOT automatically redirect a request more than 5
times, since such redirections usually indicate an infinite loop.
but that later specifications (specifically RFC-2616, which updated
HTTP/1.1) lifted such limits to give us our modern "Web From Hell".
So, with that said, the first link is to the "Redirection From Hell" test, a
test of a series of temporary redirects, always. The second link is to the
Redirection From Hell