ttf: add `font/ttf`, `application/x-font-ttf`
ttf: add `font/ttf`, `application/x-font-ttf`

https://www.rfc-editor.org/rfc/rfc8081.html#section-4.4.2
https://en.wikipedia.org/wiki/TrueType

Wikipedia doesn't have a citation for `application/x-font-ttf` (added [December 2019](https://en.wikipedia.org/w/index.php?title=TrueType&diff=prev&oldid=931818759)) but the recommended Media Type is now `font/ttf`.
cybergeek94/mime_guess