Enable PIE by default on all architectures (#1988382)

Sync with upstream branch release/2.34/master,
pthread/tst-cancel28: Fix barrier re-init race condition
Use $(pie-default) with conformtest
Run conform/ tests using newly built libc
nptl: Add one more barrier to nptl/tst-create1

x86-64: Remove LD_PREFER_MAP_32BIT_EXEC support (#2029410)

Add /usr/bin/ld.so --list-diagnostics (#2023422)

backtrace function crashes without vDSO on ppc64le (#2027789)

Sync with upstream branch release/2.34/master,
powerpc64[le]: Fix CFI and LR save address for asm syscalls [BZ #28532]
linux: Use /proc/stat fallback for __get_nprocs_conf (BZ #28624)
nptl: Do not set signal mask on second setjmp return [BZ #28607]
s390: Use long branches across object boundaries (jgh instead of jh)
elf: Earlier missing dynamic segment check in _dl_map_object_from_fd
gconv: Do not emit spurious NUL character in ISO-2022-JP-3 (bug 28524)

Create /{bin,lib,lib64,sbin} as symbolic links in test-container

Sync with upstream branch release/2.34/master,
Avoid warning: overriding recipe for .../tst-ro-dynamic-mod.so
ld.so: Initialize bootstrap_map.l_ld_readonly [BZ #28340]
ld.so: Replace DL_RO_DYN_SECTION with dl_relocate_ld [BZ #28340]
Handle NULL input to malloc_usable_size [BZ #28506]
elf: Avoid deadlock between pthread_create and ctors [BZ #28357]
timex: Use 64-bit fields on 32-bit TIMESIZE=64 systems (BZ #28469)
y2038: Use a common definition for stat for sparc32
elf: Replace nsid with args.nsid [BZ #27609]
S390: Add PCI_MIO and SIE HWCAPs
support: Also return fd when it is 0

Sync with upstream branch release/2.34/master,
Add missing braces to bsearch inline implementation [BZ #28400]
Suppress -Wcast-qual warnings in bsearch
linux: Revert the use of sched_getaffinity on get_nproc (BZ #28310)
linux: Simplify get_nprocs
misc: Add __get_nprocs_sched
nptl: pthread_kill must send signals to a specific thread [BZ #28407]
support: Add check for TID zero in support_wait_for_thread_exit

Sync with upstream branch release/2.34/master,
nptl: Avoid setxid deadlock with blocked signals in thread exit [BZ #28361]
Use support_open_dev_null_range io/tst-closefrom, misc/tst-close_range, and
spawn5 (BZ #28260)
support: Add support_open_dev_null_range
nptl: Fix type of pthread_mutexattr_getrobust_np,
nptl: pthread_kill needs to return ESRCH for old programs (bug 19193)

Sync with upstream branch release/2.34/master,
Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to
linux.h
Update kernel version to 5.14 in tst-mman-consts.py
Update syscall lists for Linux 5.14
Use Linux 5.14 in build-many-glibcs.py
Fix failing nss/tst-nss-files-hosts-long with local resolver
iconvconfig: Fix behaviour with --prefix [BZ #28199]
nptl: Fix race between pthread_kill and thread exit (swbz#12889, #1994068)
nptl: pthread_kill, pthread_cancel should not fail after exit
support: Add support_wait_for_thread_exit
MIPS: Setup errno for {f,l,}xstat
x86-64: Use testl to check __x86_string_control
elf: Fix missing colon in LD_SHOW_AUXV output (swbz#28253, #1995648)
librt: add test (swbz#28213, #1994264)
CVE-2021-38604: fix NULL pointer dereference in mq_notify
Linux: Fix fcntl, ioctl, prctl redirects for _TIME_BITS=64 (bug 28182)
iconv_charmap: Close output file when done
copy_and_spawn_sgid: Avoid double calls to close()
gaiconf_init: Avoid double-free in label and precedence lists
gconv_parseconfdir: Fix memory leak
ldconfig: avoid leak on empty paths in config file

Switch to upstream version of C.UTF-8 (#1997589)

Disable dependencies and linking for libc_malloc_debug.so (#1985048).

Switch to glibc 2.34 release tarball:
Update ChangeLog.old/ChangeLog.23.
Prepare for glibc 2.34 release.
po/nl.po: Update Dutch translation.
Update install.texi, and regenerate INSTALL.
Update translations.
Update NEWS.
NEWS: Fix typos, grammar, and missing words
elf: Fix audit regression

Port post scripts for gconv-extra to lua and drop dependency across