GNU C Library 2.39 released

Version 2.39
of the GNU C Library has been released. Changes include integration with
the x86 shadow-stack mechanism, a couple of
new posix_spawn() variants for working with control groups, pidfd_spawn() and
pidfd_spawnp(), the C2X stdbit.h header, the removal
of the libcrypt library, and more. See the release notes
for details.