Auto-sync with upstream branch master,
Upstream commit 46ae07324b1cd50fbf8f37a076d6babcfca7c510
- Improve string benchtest timing
- sysvipc: Add missing bit of semtimedop s390 consolidation
- wcsmbs: Fix data race in __wcsmbs_clone_conv [swbz #24584]
- libio: Fix gconv-related memory leak [swbz #24583]
- libio: Remove codecvt vtable [swbz #24588]
- support: Expose sbindir as support_sbindir_prefix
- support: Add missing EOL terminators on timespec
- support: Correct confusing comment
- sysvipc: Consolidate semtimedop s390
- sysvipc: Fix compat msgctl (swbz#24570)
- Add NT_ARM_PACA_KEYS and NT_ARM_PACG_KEYS from Linux 5.1 to elf.h.
- Small tcache improvements
- manual: Document O_DIRECTORY
- Update kernel-features.h files for Linux 5.1.
- nss_nis, nss_nisplus: Remove RES_USE_INET6 handling
- nss_files: Remove RES_USE_INET6 from hosts processing
- support: Report NULL blobs explicitly in TEST_COMPARE
- dlfcn: Guard __dlerror_main_freeres with __libc_once_get (once) [swbz# 24476]
- Add missing Changelog entry