misc/57501: rumpkernel.org URLs now go to another site

[lukem%NetBSD.org@localhost]

>Number:         57501
>Category:       misc
>Synopsis:       rumpkernel.org URLs now go to another site
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    misc-bug-people
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 04 10:35:00 +0000 2023
>Originator:     Luke Mewburn
>Release:        NetBSD 9.99.101
>Organization:
>Environment:
>Description:
	There's various links to http://rumpkernel.org in our
	in-tree documentation (and probably on the web site).
	That link now goes to an SEO site.

>How-To-Repeat:
	Read rumpkernel(7). Grep the repo.
	Go to the URL http://rumpkernel.org and realise that
	this isn't the documentation that you're looking for.
	A peek around wayback machine indicates the linkrot
	probably set in in late 2020.
	I also found this:
	https://www.freelists.org/post/rumpkernel-users/Broken-links-and-failing-tutorials

>Fix:
	Removing the links is trivial; it's working out what to do
	that's the issue.
	Do we just remove the links?
	Do we replace with https://github.com/rumpkernel/
	(or a sub repo such as https://github.com/rumpkernel/wiki )?