(ITS#6730) refint with subtrees/subordinates broken

[h.b.furuseth@usit.uio.no]

Full_Name: Hallvard B Furuseth
Version: 2.4.23
OS: 
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (129.240.6.233)
Submitted by: hallvard


Subtree rename breaks if an attribute contains both the base DN and a
subordinate DN: It only handles the base DN if it is in the first
attribute value, and (attempts to) produce the wrong new base.

Subtree delete is coded but ignored: Refint searches for deleted
subordinate DNs, but the test for deleting them is inverted.

Also a modification can update modifiersName several times per entry.

Fixing.