test/parseconf: Add basic dirauth and bridgeauth tests

src/test/conf_examples/bridgeauth_1/expected

src/test/conf_examples/bridgeauth_1/expected_no_dirauth

...test/conf_examples/bridgeauth_1/expected_no_dirauth_relay

src/test/conf_examples/bridgeauth_1/torrc

src/test/conf_examples/dirauth_1/expected

src/test/conf_examples/dirauth_1/expected_no_dirauth

src/test/conf_examples/dirauth_1/expected_no_dirauth_relay

src/test/conf_examples/dirauth_1/torrc