This allows for the package to be properly installed by pip
(and a standalone python setup.py install), otherwise the distutils
build stage won't see the swig-generated file.

There are probably better solutions to this issue.

Pull reference code out of apache's own util_cookies.c (which is
unfortunately not part of libapr so we can't link to it in our tests).

Also use libapr for url-escaping, getting rid of some ugly code.

Makes the code a lot easier to read. Now that Debian stable has Apache
2.4, there's really no need to keep the legacy code around (also, it
is probably buggy).

The SSO_LIBS variable was undefined.

The cookie parser wasn't checking for an equal sign after the cookie
name. Add tests for it.

The call to sso_validate in mod_sso_check_user_id wasn't using the
right sso_service variable, causing service autodetection to fail.

We were using the wrong 'service' variable. Added a test to detect
this situation.

The output is now slightly more readable. Set the DUMP_APACHE_LOG
environment variable to 1 to dump the apache2 logs after each test.

Makes it easy for web applications to retrieve the original SSO ticket.

Along with a minor refactoring of the test driver to support a second
Apache test file with a different configuration.

This change enables nonce support in mod_sso (first attempt).

The new HTTP query parameter 'n' is used to receive a unique nonce from
the authentication endpoint and store it in the generated ticket.

Still not using nonces, but fix the build.

This allows passing information from the authenticated endpoint to
the IDP and back. The ticket version number has been bumped as it
is a backwards incompatible change.