mod_rest: Stop search when an implied type is determined Optimization only, as the iteration order is undefined. And not much since there's not that many entries in the implied_types map.

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