Use more permanent URL in mailing list signup after install

[NateWr]

What is the problem?
The success screen after installation now includes a prompt to sign up to our mailing list for developer updates:

If you wish to receive news and updates, please register at https://lists.publicknowledgeproject.org/lists/. If you have questions or comments, please visit the support forum.

This is great. However, https://lists.publicknowledgeproject.org/lists/ will become a broken URL if we ever change our list management software.

What is the solution you would like?
Use a URL we can more easily control and redirect, like we do with our roadmap (https://pkp.sfu.ca/roadmap). I suggest https://pkp.sfu.ca/dev-updates-signup. We can add a 301 redirect to ensure it points to the most relevant page at any time.

What application are you using?
main branch (3.4 pre-release)

[asmecher]

I've requested that Hosting make the alias as proposed above, and gone ahead with the change in the locale files.

[NateWr]

@asmecher I think that systems already set up an alias, but it's slightly different from the one suggested above. I'll wait for confirmation and then make the change.

[NateWr]

I checked the redirect and it was https://pkp.sfu.ca/developer-newsletter, so I've updated the URLs. I also took the chance to update the install/upgrade language a little bit. I left language as-is in other locales but marked them #, fuzzy.

[asmecher]

@NateWr It looks like you missed the URL change in OMP, so I corrected those. Thanks for catching the missing newsletter text in OPS!