mod_storage_xmlarchive: Support using requested archive-id However diverging from the date-prefixed format means it will need to look through the whole archive to find a particular ID.

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