Revert some of the PR changes to tests to make sure that all of the
old format function invocations work with the old and new tests.
Implement small enchancements to documentation and credentials resolving
for usability and flexibility with custom authentication backends.
Update documentation to indicate that backwards compatibility
is supported as well as the new format credentials invocations.
Signed-off-by: Aleksi Häkli <aleksi.hakli@iki.fi>
AXES_USERNAME_CALLABLE now gets two parameters and
AXES_PASSWORD_FORM_FIELD applies to the credentials dictionary first and only uses the POST fields as a fallback anymore
and also detail how version 3 works, so that previous version 2
users who expect the `watch_login` decorator aren't confused.
Issue #272 was opened due to incorrect documentation. Unfortunately,
the relevant documentation file was deleted rather than updated,
and the issue was closed. This commit is intended to fix the missing
documentation.
