Announce: Flatpak 1.15.0 (development prerelease)

[Simon McVittie]

Available here: https://github.com/flatpak/flatpak/releases/tag/1.15.0

This is a development prerelease for the adventurous, starting the 1.15.x
branch, which will eventually lead to a 1.16.0 stable release. Don't
include this version in stable OS distributions.

The main reason I'm doing this release is to get the Meson build system
into a release, as a step towards removing Autotools later (and so that
other contributors know that build system changes need to be reflected
in the Meson build if appropriate).

$ sha256sum -b flatpak-1.15.0.tar.xz
1b953f5f2684136de4e7930d77c240f04dedd4a114e57bac0a46f5681a0a3fa8 *flatpak-1.15.0.tar.xz

Build system:

  * Flatpak can now be compiled using Meson instead of Autotools.
    This requires Meson 0.53.0 or later, and Python 3.5 or later.
    The Autotools build system is likely to be removed during either the
    1.15.x or 1.17.x cycle. (#4845)

New features:

  * Allow the modify_ldt system call as part of --allow=multiarch.
    This increases attack surface, but is required when running 16-bit
    executables in some versions of Wine. (#4297)
  * Share gssproxy socket, which acts like a portal for Kerberos authentication.
    This lets apps use Kerberos authentication without needing a sandbox hole.
    (#4914)
  * Add a httpbackend variable to flatpak.pc, allowing dependent projects
    like GNOME Software to detect whether they are compatible with libflatpak
    (#5054)

Bug fixes:

  * Terminate the flatpak-session-helper and flatpak-portal services when the
    session ends, so that applications will not inherit outdated Wayland
    and X11 socket addresses (#5068)
  * When using fish shell, don't overwrite a previously-set XDG_DATA_DIRS
    (#5123)
  * Don't try to enable HTTP 2 if linked to a libcurl version that doesn't
    support it (#5074)
  * Stop systemd reporting the session-helper as failed when terminated by
    a signal (#5129)
  * Fix a warning when listing a document with no permissions (#5055)
  * Fix compilation with GLib 2.66.x (as used in Debian 11) (#5062)
  * Fix compilation with GLib 2.58.x (as used in Debian 10) (#5066)
  * Make generated files more reproducible (#5085)
  * Translation updates: cs, id, pl, pt_BR (#5052, #5056, #5059, #5126)

Internal changes:

  * Update project logo in README (#5119)
  * Update libglnx subproject (#5140)

-- 
Simon McVittie, Collabora Ltd. / Debian
on behalf of the Flatpak maintainers