Recognizes Open Document Database

Recognizes Open Document Database

Mediawiki does not recognizes the mime type of an OpenOffice / Libre
Office Database Frontend Document and thus uses application/zip.

Our MimeAnalyzer::detectZipType() looks at the Zip files to detect known
signatures, however it is based on a reference from 2005 which did not
have the Database type yet.

OASIS Open Document Format v1.2 specify non normative MIME types, the
reference supposedly being the ones registered with the IANA, but we
have some dispredancy: ODF recommends 'base' while the IANA got
'database' registered: https://www.iana.org/assignments/media-types/

I supposed the format got approved as is, the Database mime type being
'recommended' probably because the IANA registration was pending.

Add the 'base' type which is being used by OpenOffice 3.x and later as
well as at least Libre Office 5.x.
Document my findings in code comments.
Add a test.

Bug: T35515
Change-Id: If0210a87067358612ecb8b3edd001fb05d01653d