librt: fix NULL pointer dereference (#1966472).

CVE-2021-33574: Deep copy pthread attribute in mq_notify (#1966472)

CVE-2021-35942: wordexp: handle overflow in positional parameter number

Improve POWER10 performance with POWER9 fallbacks (#1956357)

Backport POWER10 optimized rawmemchr for ppc64le (#1956357)

Backport additional ifunc optimizations for ppc64le (#1956357)

Rebuild with new binutils (#1946518)

Consistently SXID_ERASE tunables in sxid binaries (#1934155)

Backport ifunc optimizations for glibc for ppc64le (#1918719)

CVE-2021-27645: nscd: Fix double free in netgroupcache (#1927877)

Add IPPROTO_ETHERNET, IPPROTO_MPTCP, and INADDR_ALLSNOOPERS_GROUP defines

Support SEM_STAT_ANY via semctl. Return EINVAL for unknown commands to semctl,

Update syscall-names.list to 5.7, 5.8, 5.9, 5.10 and 5.11. (#1871386)

CVE-2019-9169: Fix buffer overread in regexec.c (#1936864).

Rebuild glibc to update security markup metadata (#1935128)

Fix NSS files and compat service upgrade defect (#1932770).