[SSSD] [sssd PR#5539][synchronized] [WIP] NSS: Clear negative cache when SIGHUP received

[elkoniu]

   URL: https://github.com/SSSD/sssd/pull/5539
Author: elkoniu
 Title: #5539: [WIP] NSS: Clear negative cache when SIGHUP received
Action: synchronized

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/5539/head:pr5539
git checkout pr5539