Keeping a copy of the backlinks has some merit. It could also be
incrementally updated.
+ This old bug still exists as of 031d1bf5046ab77c796477a19967e7c0c512c417.
+
* And if Foo/Bar/Baz is then removed, Foo/Bar gets a broken link,
instead of changing back to linking to Foo/Baz.
-This old bug still exists as of 031d1bf5046ab77c796477a19967e7c0c512c417.
+ This part was finally fixed by commit
+ f1ddf4bd98821a597d8fa1532092f09d3d9b5483.