Add definition and test file for StuffIt X archives.
There is an existing definition for the older StuffIt and StuffIt 5.5 formats. This newer format was added in StuffIt 7 in 2002 with separate Media-Type.
From StuffIt Deluxe 7.0.app/Contents/Info.plist
on my PowerBook 2400c:
<dict>
<key>CFBundleTypeName</key>
<string>StuffIt X Archive</string>
<key>CFBundleTypeRole</key>
<string>Editor</string>
<key>CFBundleTypeIconFile</key>
<string>159</string>
<key>CFBundleTypeOSTypes</key>
<array>
<string>SITX</string>
</array>
<key>CFBundleTypeExtensions</key>
<array>
<string>sitx</string>
</array>
<key>CFBundleTypeMIMETypes</key>
<array>
<string>application/x-stuffitx</string>
<string>application/x-sitx</string>
</array>
</dict>
My included test.sitx
was created with the same version of the software
on the same machine:
[okeeblow@emi#shared-mime-info] xxd -l 16 tests/mime-detection/test.sitx
00000000: 5374 7566 6649 7421 a10a 4a05 9bdd 4215 StuffIt!..J...B.
Apache HTTPd is aware of this Media-Type: https://bz.apache.org/bugzilla/show_bug.cgi?id=38009
PRONOM format definition: https://www.nationalarchives.gov.uk/PRONOM/Format/proFormatSearch.aspx?status=detailReport&id=1147