Commit message:
```
multimedia/emby-server: Update to 4.6.6.0
Update emby-server and the embedded ffmpeg built. Streamline the
configure target with upstream. Samba support has been dropped and
tesseract is made into an option given the size of this dependency.
Changes : https://github.com/MediaBrowser/Emby.Releases/releases/tag/4.6.6.0
Approved by: tbd (mentor)
Differential Revision:
```