Unable to Change MIME Types Reported by File

[Brian Monroe]

I'm having trouble registering a new mime type. I had this working in
Fedora 26 (and 27 iirc) but it seems to not be working in F28. I'm adding
some lines to /usr/share/misc/magic and then recompiling and replacing
/usr/share/mime/magic.mgc . In the past this has worked to patch the mime
type this way and still works in RHEL/CentOS 7.

Using
file --mime-type -k  exampleFile.ica
I can see my entry as the second item, but even after adding `!:strength
+250` it doesn't override the default, which is
application\x-wine-extension-ini

I even went so far as to remove all lines containing x-wine-extension-ini
from the magic file but the assignment persists, which makes me think that
either file no longer looks to /usr/share/mime/magic.mgc for the only place
for mime types, there's a bug, or something else I haven't considered.

I'm happy to fill out a bug report (search through bugzilla I don't see
anything) but didn't want to if there was just a change that I missed.