There are more, but these are most common ones.
There are also a number of urls that don't behave well when https, so those are skipped
At some point I have also started marking non-working URLs as [DEAD LINK], though
that's not a full coverage.
This reverts commit aa53c23239, reversing
changes made to 3c946a8449, because
aa53c23 was based on master and so undid other changes made to maint
since the last merge-to-master.