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

[centos-ci]

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

centos-ci commented:
"""
Can one of the admins verify this patch?
"""

See the full comment at https://github.com/SSSD/sssd/pull/677#issuecomment-429850535