audio/logitechmediaserver: update to 8.4.0

Changelog: https://github.com/Logitech/slimserver/blob/8.4.0/Changelog8.html

Major changes:

• Additional plugins, views
• The ability to import playlists from other services

Port changes:

since mysqueezebox.com is going to close down imminently, add
the --nomysqueezebox to the server invocation to make life easier
https://lms-community.github.io/getting-started/changelog-lms8/#version-850

PR: 277299
Reported by: Trenton Schulz <trueos@norwegianrockcat.com> (maintainer)