b4 to accept https://patch.msgid.link/

Hi!

Some of the maintainers are using https://patch.msgid.link/ format of URLs
in the Link tags of the applied patches in their tree (and then it becomes in
upstream in most cases). It would be nice if `b4` can recognize this URLs
in the command line for `b4 mbox https://patch.msgid.link/...`

Current behaviour:

$ b4 mbox https://patch.msgid.link/20250303-veal-snooper-712c1dfad336@wendy
Grabbing thread from lore.kernel.org/all/https%3A%2F%2Fpatch.msgid.link%2F20250303-veal-snooper-712c1dfad336@wendy/t.mbox.gz
That message-id is not known.

Expected behaviour:

$ b4 mbox https://patch.msgid.link/20250303-veal-snooper-712c1dfad336@wendy
Grabbing thread from lore.kernel.org/all/20250303-veal-snooper-712c1dfad336@wendy/t.mbox.gz
2 messages in the thread
Saved ./20250303-veal-snooper-712c1dfad336@wendy.mbx

P.S> A bit of offtopic here: one thing which would be extremely helpful in web
interface to Git on kernel.org is the automatic links (<a href=...> tags) to
the Fixes tag. Ideally also to any "commit reference" in the commit message
text.

-- 
With Best Regards,
Andy Shevchenko