Something happened during rebase. This configuration is supposed to be
True by default now.

The couch state checks if all user databases have the correct schema
version on initialization, and may log errors and raise exceptions if
that is not the case. Because we are currently using `twistd web
--wsgi`, if those errors are logged too early the reactor may have not
been started and the twistd logging facilities may not have been
initialized.

This commit delays the state initialization until the reactor has been
started, to make sure any errors raised and logged in that stage will
actually reach the logfile.

received docs makes no sense for a single request download, plus all its
comments and docstrings. Also updated docstrings for other methods.
The method that tests if sqlcipher is encrypted can return a db handle
that can be used right away. If we ignore it and reopen we can end up
with a lost open cursor.

Fixes setup.cfg, adding current exclude rules, simplified tox.ini to use
setup.cfg and fixed all.

Request size on a stream can't be measured upfront and a limit doesn't
make much sense. The real limit is user's Quota, to be implemented.

Moved out magic numbers into a constant and simplified logic during doc
upload.