SESSION_EXPIRE_AT_BROWSER_CLOSE = True
later we can maybe have a "remember me" checkbox at login time, so a user can decide on his
own whether to use session or long-living cookie.
the original code looked somehow like it was meant to have a lazy on-demand behaviour, just computing what is used in the format string for log output.
problem is that this doesn't really happen practically, the logging code requests ALL values for all keys.
as this stuff is used rather often, the new code was optimized to just build a dictionary of values rather cheaply.
support for request.host was removed as I suspect the required socket operation might be not be cheap enough.
help: there was only a link to the rtd documentation (now directly linked from a "Documentation" navbar entry)
and some duplicate router configuration that was also shown (even with the correct values) when adding a host.
the help page html was not valid due to the values inserted into the router configuration help.
help/documentation policy: add static help to the docs, add dynamic help directly at the places (in the views) where needed
could happen if there once was a IPv6 connection, but now is not any more.
it now kills infos older than 3 minutes from the session.
it also shows the age of the infos now on the hosts overview view (but not on home view due to cosmetic reasons).
optimization: only request the fake images for ipv4/v6 detection if we don't have a fresh IP already.
added example settings for using detectip on (ip6-)localhost
remove unneeded stuff from settings
(we still need some in conftest.py for the tests, though)
init DB for tests via conftest.py
more update algorithm choices
give origin zone (if we already know it) to dnstools functions
new views: DomainOverview, DeleteDomain
unify deletion templates using delete_object.html
add django-extensions
