Accepting request 407107 from home:Andreas_Schwab:Factory

- strncat-avoid-array-bounds-warning.patch: Avoid array-bounds warning for
  stncat on i586 (BZ #20260)
- Update glibc.keyring
- Unset MALLOC_CHECK_ during testsuite run

- nsswitch.conf: Add fallback to files for passwd and group to prepare for
  libnsl removal.

- nis-initgroups-status.patch: Return proper status from
  _nss_nis_initgroups_dyn (bsc#984269, BZ #20262)
- robust-mutex-deadlock.patch: Fix generic __lll_robust_timedlock_wait to
  check for timeout (bsc#985170, BZ #20263)

OBS-URL: https://build.opensuse.org/request/show/407107
OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=442

nsswitch.conf

@@ -26,8 +26,8 @@
 # shadow: files nis
 # group:  files nis
 
-passwd: compat
-group:  compat
+passwd: compat [NOTFOUND=return] files
+group:  compat [NOTFOUND=return] files
 
 hosts:  	files dns
 networks:	files dns