[ponymail] Improving the UX of linking to private archives

[Sam Ruby <ru...@intertwingly.net>]

Not sure where to send this, but it makes sense to copy dev@whimsical.

I changed the roster tool to point to lists.apache.org for mail 
archives.  Example:

https://whimsy.apache.org/roster/committee/whimsy

(Note: s/whimsy/whimsy3/ if you get a proxy error)

The problem comes in if you click on whimsical-private and have not 
previously authenticated with that browser (try private/incognito mode 
to see this); what happens is that you are redirected to dev@whimsical 
with no explanation.

Contrast that with 
https://mail-search.apache.org/members/private-arch/whimsical-private/ 
which prompts you for authentication and refuses to proceed unless you 
authenticate correctly.

- Sam Ruby