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

[jhrozek]

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

jhrozek commented:
"""
add to whitelist
"""

See the full comment at https://github.com/SSSD/sssd/pull/677#issuecomment-429936705