[SSSD] [sssd PR#677][synchronized] pcre: port to pcre2

[thalman]

URL: https://github.com/SSSD/sssd/pull/677
Author: thalman
 Title: #677: pcre: port to pcre2
Action: synchronized

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/677/head:pr677
git checkout pr677