Update the testing suite for use with non-MACing clients.

This includes a separate non-MAC datafile, testing_input_nomac.dat, which can
be used with safebrowsing_test_server.py.

The test server can also be safely stopped and restarted within the same
Python process.



git-svn-id: http://google-safe-browsing.googlecode.com/svn/trunk@109 2195c2fd-d934-0410-ae3f-cd772a4098b8