[sssd PR#1036][comment] certmap: sanitize LDAP search filter

[jsf9k]

URL: https://github.com/SSSD/sssd/pull/1036
Title: #1036: certmap: sanitize LDAP search filter

jsf9k commented:
"""
I am running into this same issue, also having to do with parentheses in CNs when dealing with U.S. government smart cards.  I'm going to have to configure FreeIPA to match on full certificates for now and revert back to using certmap data once this PR is merged.
"""

See the full comment at https://github.com/SSSD/sssd/pull/1036#issuecomment-659416781