https://bugzilla.wikimedia.org/show_bug.cgi?id=55036
--- Comment #8 from Kunal Mehta (Legoktm) legoktm.wikipedia@gmail.com --- There are several bot who work on double redirects several time a day. The remaining items might be redirect loops or self redirects. e.g.
Foo --> Foo --> Foo are always self loops
Foo --> Bar --> Foo Bar --> Foo --> Bar are always redirect loops
is it difficult?