mod_sasl2: Fix <challenge> generation - We are just adding child text data, so the correct method is :text() - The data should be base64-encoded, but it was being sent raw

2c07bcf56a36d6e74dc0f5422e89bd61f4d31239 0.8-diverge
1656d4fd71d07aa3a52da89d4daf7723a555e7dd last-google-code-commit