(ITS#5702) [enhancement] allow cross-attribute constraints in slapo-constraint(5)

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: HEAD
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (81.72.89.40)
Submitted by: ando


I've added a "set" type to slapo-constraint(5) that allows to write complex
constraints like

constraint_attribute cn,sn,givenName set
                "(this/givenName + [ ] + this/sn) & this/cn"

forcing a relationship between the values of cn, sn and givenName.

The possibility to enforce the same constraint on multiple attributes separated
by commas is given to all constraint types, as a side-effect.

The check is passed the entry during add operations, while it attempts to build
the entry resulting from a set of modifications during modify operations.

p.