(ITS#4255) ACL "exact" attrval clause needs normalized value

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: HEAD,re23
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (81.74.43.82)
Submitted by: ando


When using the ACL attrval clause with the "exact" style (the default), the
value provided in the clause must be already normalized; this is error prone and
may be non-trivial for fancy syntaxes.  A fix is in HEAD. 

p.