LDAP search can't handle binary data
Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=2873
Reported by David Israelsson, Roxen IS david@roxen.com
Search operations in Protocols.LDAP.client fail in utf8_to_string when a record contains base64 encoded binary data.
Detected in pf 2.2.253 / Pike 7.2.259.