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

[thalman]

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

PR body:
"""
Some distributions want to drop pcre support. Sssd should work with
pcre2. With this patch sssd tries to use pcre2 if pcre is not present.

Resolves:
https://pagure.io/SSSD/sssd/issue/3833
"""

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