audio/lyrionmusicserver: Update 9.0.3 => 9.1.0

Changelog:
https://github.com/LMS-Community/slimserver/blob/9.1.0/Changelog9.html

Also unbreaks lyrionmusicserver from hanging indefinitely on
15.0-RELEASE and above. The culprit seems to be in one of the Perl
modules from the ports collection (but I don't know which one). For
now, I've gone back to the vendor version of modules (except for
p5-EV) until I can investigate more. This at least makes the server
work again on FreeBSD 14 and 15.

Improve port:

• Fix warnings from portclippy.
• Remove unused dependencies from gettext and libgd.
• Improve USE_GITHUB usage.
• Replace RM in post-patch with EXTRACT_AFTER_ARGS=--exclude.
• Fix build with non-default user/group.
• Convert patches to apply with default PATCH_WRKSRC.
• Replace LN with RLN.
• Add ${SLIMDBDIR}/cache to pkg-plist.
• Sort pkg-list.

PR: 293661
Sponsored by: UNIS Labs
MFH: 2026Q2
Co-authored-by: Vladimir Druzenko <vvd@FreeBSD.org>