Thanks for the report about the broken link into the automake-history documentary. After a mere seven years :), I've added a .symlinks entry in the automake web repository, so it resolves now. Closing ... --thanks again, karl.
P.S. For the record, the same place in the mono automake.html, https://www.gnu.org/software/automake/manual/automake.html#Dependencies links to https://www.gnu.org/software/automake/manual/automake-history.html#Dependency-Tracking-Evolution which then redirects to https://www.gnu.org/savannah-checkouts/gnu/automake/history/automake-history.html#Dependency-Tracking-Evolution which as I recall is done as special cases in the web server setup by FSF sysadmin. Anyway, does not look optimal, but it works, so fine :).