Announce: Flatpak 1.12.0

[Alexander Larsson]

Available at:
   https://github.com/flatpak/flatpak/releases/tag/1.12.0

$ sha256sum flatpak-1.12.0.tar.xz
d8a9a1f4cd1790711e836964eab6fb69de83b86c902249fff0c73706c73dd586
flatpak-1.12.0.tar.xz

This is the first stable release in the 1.12.x series. The major changes
in this series is the support for better control of sub-sandboxes, as
used by the steam flatpak.

In addition, this release fixes a security vulnerability in the portal
support. Some recently added syscalls were not blocked by the seccomp rules
which allowed the application to create sub-sandboxes which can confuste
the sandboxing verification mechanisms of the portal. This has been
fixed by extending the seccomp rules.
For details, see:
  https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q

Other changes in this version:
 * Some test fixes
 * Update translations
 * Support for specifying the flatpak binary to use during exports
 * Install translations for all languages in the locale, not just the ones in
   LC_MESSAGES.
 * Fix progress reporting in flatpak fsck
 * Handle cases where /var/tmp is a symlink
 * Expose /etc/gai.conf to the sandbox
 * Fix the parental control checks for root
 * Handle missing /etc/ld.so.cache (musl)

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 Alexander Larsson                                Red Hat, Inc
       alexl at redhat.com         alexander.larsson at gmail.com