- Fix segfaults in newgrp and pwck
* Add shadow-4.9-newgrp-segfault.patch
https://github.com/shadow-maint/shadow/pull/437
* Add shadow-4.9-pwck-segfault.patch
https://github.com/shadow-maint/shadow/pull/445

- Added hardening to systemd service(s) (bsc#1181400). Modified:
* shadow.service

- shadow-util-linux.patch:
* Remove the section patching lib/getdef.c in favor of the
upstream FOREIGNDEFS.
* Add LOGIN_KEEP_USERNAME to login.defs.
* Remove PREVENT_NO_AUTH from login.defs. Only used by the
unpackaged login and su.
- shadow-login_defs-unused-by-pam.patch:
* Remove variables BCRYPT_MIN_ROUNDS, BCRYPT_MAX_ROUNDS,
YESCRYPT_COST_FACTOR, not supported by the current
configuratiton.
- Update login_defs-support-for-pam symbol to version 1.5.2
(support for new variable HMAC_CRYPTO_ALGO).
- Update login_defs-support-for-util-linux to version 2.37
(support for new variable LOGIN_KEEP_USERNAME).
- Refresh shadow-login_defs-comments.patch and
shadow-login_defs-suse.patch.
- Improve shadow-login_defs-check.sh:
* Add helper to import local new version in the parent dir.
* Fix spec editing sed expression.
* Add PREVENT_NO_AUTH to known unused variables.
* Update pam sed expression to find HMAC_CRYPTO_ALGO.