public class WARCOutputFormat
Hadoop OutputFormat for mapreduce jobs ('new' API) that want to write data to WARC files. Usage:
```java Job job = new Job(getConf()); job.setOutputFormatClass(WARCOutputFormat.class);
FileOutputFormat.setCompressOutput(job, true); ``` The tasks generating the output (usually the
reducers, but may be the mappers if there are no reducers) should use `NullWritable.get()` as the
output key, and the WARCWritable as the output value.