When using a search-based mapping for an authentication DN to a user's
DN, certain characters, namely '(' and ')', will cause the mapping to
fail. In order for the mapping to succeed, the characters need to be
properly escaped so they pass str2filter().
Is there any reason that special characters used in authz-regexp filters
should not be escaped when using search-based mappings?
I am testing this with 2.4.21.