Continuing to host out-of-date PEPs on legacy.python.org is confusing

[njsmith]

We just had a confusing thread on distutils-sig where it turned out that someone was spending time reviewing and giving feedback on the version of PEP 517 on legacy.python.org, which is totally out of date.

If I google "PEP 517" right now, then the first result is the out-of-date version on legacy.python.org, and the correct link does not seem to appear in the search results (!!). (I guess google has decided that the version on legacy.python.org is the canonical version and is suppressing the www.python.org version as a duplicate?)

Could these links be made to redirect to the new, correct pages? It looks like the paths are unchanged, it just needs to get sent to the correct host:

Old: http://legacy.python.org/dev/peps/pep-0517/
New: https://www.python.org/dev/peps/pep-0517/

[hugovk]

I've not see legacy.python.org in Google searches for a long time, and it doesn't show up in a "PEP 517" search right now.

Perhaps this can be closed, or do we still want redirects?