Add ability to handle atc current logging format.

atc currently just sends marionette events.  This is fine for now, but is not really logging much.
Fix lack of logging config in develop.ini
Remove userserver key and replace with cnx-user-url.

The new key is used in talking to the new cnx-user service, and the
old userserver key is only used in old bamboo recipies and can be
replaced there.
Add the logic of is user logged in to index

remove the logic at /home, put it onto /
Bug fix in weblogging and DMZ
Bug fix the bug fix
Put the logout call in the right place

We were calling logout but it was not hooked up to the delete session
Change the FOO placeholder to hasVisitedPreviously

It does not matter what the value in kv pair is, we only want to know
if this browser has been seen before. However FOO does not look suitable,
so change it to a better name.