[cgiapp] disabling edit access to the wiki for now

[Mark Stosberg]

I've now made some edits that I believe should disable edit access to
the old wiki. I've asked David Kaufman at Erlbaum.net to reload Apache
for us so that they can take effect.

It will remove the edit button from every page, and will prevent a
direct POST to the edit processing run mode from saving the page.

   Mark