dlang.org endpoint for permanent links to DIPs

[Dennis]

Given an issue number, getting the URL for that issue is not 
hard. Just put it into this string:
https://issues.dlang.org/show_bug.cgi?id=#####

DIPs, however, have it harder. Early DIPs are at:

https://wiki.dlang.org/DIP##

DIPs above 1000 under review can be found like this:

https://github.com/dlang/DIPs/blob/master/DIPs/DIP####.md

But after review, it will be moved to sub folders like 
'accepted', 'rejected' and 'other'. Consequently, links to DIPs 
can easily become dead, for example:

https://github.com/dlang/dmd/pull/10817

You can use a permanent link to a commit on GitHub, but those are 
very long and refer to the DIP at that moment, not the most 
recent version.

Can we create an endpoint on dlang.org that redirects to the 
latest version of a DIP? Something like:

https://dips.dlang.org/####
https://www.dlang.org/dips/####

I would try to implement this myself but I'm not an experienced 
web developer, and as far as I can tell only the static content 
of dlang.org is open source, so help from people in charge of the 
dlang.org domain would be appreciated.