[PHJ2000]

Refs #90.

The bundled magic rules recognize the reported file as Vorbis audio, but inherit application/ogg from the generic Ogg rule. Set audio/ogg on the existing Vorbis continuation, consistent with RFC 5334 section 10.3.

Add ContentType.OGA for the audio MIME type and its associated extensions. Keep the existing extension-only .ogg, .oga and .spx lookups mapped to OGG. Unidentified Ogg, unknown revisions and other codec rules retain their previous behavior. This is a focused Vorbis classification change, not a general multiplexed-Ogg inspection.

The tests use newly constructed identification-page prefixes, with no music file added to the repository. They cover default byte-array and InputStream detection, explicit plaintext rules, MIME metadata, generic/video fallbacks and extension-only lookups. Maven's existing compile step continues to generate the bundled magic.gz from the updated rules.

Validation on Linux with JDK 11.0.32.1:

• The same seven regression cases compile and run on both versions: base has four failures and three passing controls; the patched version passes all seven.
• mvn --batch-mode --no-transfer-progress --show-version clean package passes 366 tests, with two existing ignored tests and no failures or errors (368 entries). This is the repository CI build command and includes Javadoc and packaging.
• A separate probe loads the packaged JAR and reads the actual 530,842-byte issue attachment through the public File API. It returns audio/ogg and OGA. The attachment is retained only as a local diagnostic input.
• Other JDKs/operating systems and additional Ogg codecs have not been validated locally. The probe is separate from the full test-suite result.

Focused command:

mvn --batch-mode --no-transfer-progress --show-version -Dtest=OggMimeTypeTest test