Replace POSIX::tzset with DateTime::TimeZone for cross-platform alarm scheduling

POSIX::tzset with $ENV{TZ} does not work on Windows, where Perl requires
Windows-native timezone names rather than Olson identifiers. This made
alarm scheduling in a player's timezone silently fall back to the server
timezone on Windows.

Replace with DateTime::TimeZone, which uses a bundled IANA timezone
database and works identically on all platforms.

- Add Slim::Utils::DateTime::localtimeInTZ($epoch, $tzName), a thin
  wrapper around DateTime::TimeZone that returns a localtime()-style
  list in the named Olson timezone, with a per-process cache and a
  graceful fallback to server timezone for unrecognised names
- Use localtimeInTZ in Slim::Utils::Alarm::findNextTime and
  Slim::Plugin::Rescan::Plugin::checkScanTimer, replacing the
  POSIX::tzset save/restore blocks
- Bundle DateTime::TimeZone 2.66 (IANA tzdata 2025c) and its
  dependencies in CPAN/

Signed-off-by: Bartosz Oudekerk <lot+github@unreachablehost.net>

Author: Bartosz Oudekerk

CPAN/B/Hooks/EndOfScope.pm

@@ -0,0 +1,177 @@
+package B::Hooks::EndOfScope; # git description: 0.27-8-gbe15c53
+# ABSTRACT: Execute code after a scope finished compilation
+# KEYWORDS: code hooks execution scope
+
+use strict;
+use warnings;
+
+our $VERSION = '0.28';
+
+use 5.006001;
+
+BEGIN {
+  use Module::Implementation 0.05;
+  Module::Implementation::build_loader_sub(
+    implementations => [ 'XS', 'PP' ],
+    symbols => [ 'on_scope_end' ],
+  )->();
+}
+
+use Sub::Exporter::Progressive 0.001006 -setup => {
+  exports => [ 'on_scope_end' ],
+  groups  => { default => ['on_scope_end'] },
+};
+
+1;
+
+__END__
+
+=pod
+
+=encoding UTF-8
+
+=head1 NAME
+
+B::Hooks::EndOfScope - Execute code after a scope finished compilation
+
+=head1 VERSION
+
+version 0.28
+
+=head1 SYNOPSIS
+
+    on_scope_end { ... };
+
+=head1 DESCRIPTION
+
+This module allows you to execute code when perl finished compiling the
+surrounding scope.
+
+=head1 FUNCTIONS
+
+=head2 on_scope_end
+
+    on_scope_end { ... };
+
+    on_scope_end $code;
+
+Registers C<$code> to be executed after the surrounding scope has been
+compiled.
+
+This is exported by default. See L<Sub::Exporter> on how to customize it.
+
+=head1 LIMITATIONS
+
+=head2 Pure-perl mode caveat
+
+This caveat applies to B<any> version of perl where L<Variable::Magic>
+is unavailable or otherwise disabled.
+
+While L<Variable::Magic> has access to some very dark sorcery to make it
+possible to throw an exception from within a callback, the pure-perl
+implementation does not have access to these hacks. Therefore, what
+would have been a B<compile-time exception> is instead B<converted to a
+warning>, and your execution will continue as if the exception never
+happened.
+
+To explicitly request an XS (or PP) implementation one has two choices. Either
+to import from the desired implementation explicitly:
+
+ use B::Hooks::EndOfScope::XS
+   or
+ use B::Hooks::EndOfScope::PP
+
+or by setting C<$ENV{B_HOOKS_ENDOFSCOPE_IMPLEMENTATION}> to either C<XS> or
+C<PP>.
+
+=head2 Perl 5.8.0 ~ 5.8.3
+
+Due to a L<core interpreter bug
+|https://rt.perl.org/Public/Bug/Display.html?id=27040#txn-82797> present in
+older perl versions, the implementation of B::Hooks::EndOfScope deliberately
+leaks a single empty hash for every scope being cleaned. This is done to
+avoid the memory corruption associated with the bug mentioned above.
+
+In order to stabilize this workaround use of L<Variable::Magic> is disabled
+on perls prior to version 5.8.4. On such systems loading/requesting
+L<B::Hooks::EndOfScope::XS> explicitly will result in a compile-time
+exception.
+
+=head2 Perl versions 5.6.x
+
+Versions of perl before 5.8.0 lack a feature allowing changing the visibility
+of C<%^H> via setting bit 17 within C<$^H>. As such the only way to achieve
+the effect necessary for this module to work, is to use the C<local> operator
+explicitly on these platforms. This might lead to unexpected interference
+with other scope-driven libraries relying on the same mechanism. On the flip
+side there are no such known incompatibilities at the time this note was
+written.
+
+For further details on the unavailable behavior please refer to the test
+file F<t/02-localise.t> included with the distribution.
+
+=head1 SEE ALSO
+
+L<Sub::Exporter>
+
+L<Variable::Magic>
+
+=head1 SUPPORT
+
+Bugs may be submitted through L<the RT bug tracker|https://rt.cpan.org/Public/Dist/Display.html?Name=B-Hooks-EndOfScope>
+(or L<bug-B-Hooks-EndOfScope@rt.cpan.org|mailto:bug-B-Hooks-EndOfScope@rt.cpan.org>).
+
+=head1 AUTHORS
+
+=over 4
+
+=item *
+
+Florian Ragwitz <rafl@debian.org>
+
+=item *
+
+Peter Rabbitson <ribasushi@leporine.io>
+
+=back
+
+=head1 CONTRIBUTORS
+
+=for stopwords Karen Etheridge Graham Knop Christian Walde Simon Wilper Tatsuhiko Miyagawa Tomas Doran
+
+=over 4
+
+=item *
+
+Karen Etheridge <ether@cpan.org>
+
+=item *
+
+Graham Knop <haarg@haarg.org>
+
+=item *
+
+Christian Walde <walde.christian@googlemail.com>
+
+=item *
+
+Simon Wilper <sxw@chronowerks.de>
+
+=item *
+
+Tatsuhiko Miyagawa <miyagawa@bulknews.net>
+
+=item *
+
+Tomas Doran <bobtfish@bobtfish.net>
+
+=back
+
+=head1 COPYRIGHT AND LICENCE
+
+This software is copyright (c) 2008 by Florian Ragwitz.
+
+This is free software; you can redistribute it and/or modify it under
+the same terms as the Perl 5 programming language system itself.
+
+=cut

CPAN/B/Hooks/EndOfScope/PP.pm

@@ -0,0 +1,110 @@
+package B::Hooks::EndOfScope::PP;
+# ABSTRACT: Execute code after a scope finished compilation - PP implementation
+
+use warnings;
+use strict;
+
+our $VERSION = '0.28';
+
+use constant _PERL_VERSION => "$]";
+
+BEGIN {
+  if (_PERL_VERSION =~ /^5\.009/) {
+    # CBA to figure out where %^H got broken and which H::U::HH is sane enough
+    die "By design B::Hooks::EndOfScope does not operate in pure-perl mode on perl 5.9.X\n"
+  }
+  elsif (_PERL_VERSION < '5.010') {
+    require B::Hooks::EndOfScope::PP::HintHash;
+    *on_scope_end = \&B::Hooks::EndOfScope::PP::HintHash::on_scope_end;
+  }
+  else {
+    require B::Hooks::EndOfScope::PP::FieldHash;
+    *on_scope_end = \&B::Hooks::EndOfScope::PP::FieldHash::on_scope_end;
+  }
+}
+
+use Sub::Exporter::Progressive 0.001006 -setup => {
+  exports => ['on_scope_end'],
+  groups  => { default => ['on_scope_end'] },
+};
+
+sub __invoke_callback {
+  local $@;
+  eval { $_[0]->(); 1 } or do {
+    my $err = $@;
+    require Carp;
+    Carp::cluck( (join ' ',
+      'A scope-end callback raised an exception, which can not be propagated when',
+      'B::Hooks::EndOfScope operates in pure-perl mode. Your program will CONTINUE',
+      'EXECUTION AS IF NOTHING HAPPENED AFTER THIS WARNING. Below is the complete',
+      'exception text, followed by a stack-trace of the callback execution:',
+    ) . "\n\n$err\n\r" );
+
+    sleep 1 if -t *STDERR;  # maybe a bad idea...?
+  };
+}
+
+1;
+
+__END__
+
+=pod
+
+=encoding UTF-8
+
+=head1 NAME
+
+B::Hooks::EndOfScope::PP - Execute code after a scope finished compilation - PP implementation
+
+=head1 VERSION
+
+version 0.28
+
+=head1 DESCRIPTION
+
+This is the pure-perl implementation of L<B::Hooks::EndOfScope> based only on
+modules available as part of the perl core. Its leaner sibling
+L<B::Hooks::EndOfScope::XS> will be automatically preferred if all
+dependencies are available and C<$ENV{B_HOOKS_ENDOFSCOPE_IMPLEMENTATION}> is
+not set to C<'PP'>.
+
+=head1 FUNCTIONS
+
+=head2 on_scope_end
+
+    on_scope_end { ... };
+
+    on_scope_end $code;
+
+Registers C<$code> to be executed after the surrounding scope has been
+compiled.
+
+This is exported by default. See L<Sub::Exporter> on how to customize it.
+
+=head1 SUPPORT
+
+Bugs may be submitted through L<the RT bug tracker|https://rt.cpan.org/Public/Dist/Display.html?Name=B-Hooks-EndOfScope>
+(or L<bug-B-Hooks-EndOfScope@rt.cpan.org|mailto:bug-B-Hooks-EndOfScope@rt.cpan.org>).
+
+=head1 AUTHORS
+
+=over 4
+
+=item *
+
+Florian Ragwitz <rafl@debian.org>
+
+=item *
+
+Peter Rabbitson <ribasushi@leporine.io>
+
+=back
+
+=head1 COPYRIGHT AND LICENCE
+
+This software is copyright (c) 2008 by Florian Ragwitz.
+
+This is free software; you can redistribute it and/or modify it under
+the same terms as the Perl 5 programming language system itself.
+
+=cut

CPAN/B/Hooks/EndOfScope/PP/FieldHash.pm

@@ -0,0 +1,45 @@
+# Implementation of a pure-perl on_scope_end for perls > 5.10
+# (relies on Hash::Util:FieldHash)
+
+package # hide from pause
+  B::Hooks::EndOfScope::PP::FieldHash;
+
+use strict;
+use warnings;
+
+our $VERSION = '0.28';
+
+use Tie::Hash ();
+use Hash::Util::FieldHash 'fieldhash';
+
+# Here we rely on a combination of several behaviors:
+#
+# * %^H is deallocated on scope exit, so any references to it disappear
+# * A lost weakref in a fieldhash causes the corresponding key to be deleted
+# * Deletion of a key on a tied hash triggers DELETE
+#
+# Therefore the DELETE of a tied fieldhash containing a %^H reference will
+# be the hook to fire all our callbacks.
+
+fieldhash my %hh;
+{
+  package # hide from pause too
+    B::Hooks::EndOfScope::PP::_TieHintHashFieldHash;
+  our @ISA = ( 'Tie::StdHash' );  # in Tie::Hash, in core
+  sub DELETE {
+    my $ret = shift->SUPER::DELETE(@_);
+    B::Hooks::EndOfScope::PP::__invoke_callback($_) for @$ret;
+    $ret;
+  }
+}
+
+sub on_scope_end (&) {
+  $^H |= 0x020000;
+
+  tie(%hh, 'B::Hooks::EndOfScope::PP::_TieHintHashFieldHash')
+    unless tied %hh;
+
+  push @{ $hh{\%^H} ||= [] }, $_[0];
+}
+
+1;