(ITS#5659) patch for collect overlay

Full_Name: Brett Maxfield Version: HEAD OS: Linux suse 2.6.22.18-0.2-xen #1 SMP 2008-06-09 13:53:20 +0200 x86_64 x86_64 x86_64 GNU/Linux URL: ftp://ftp.openldap.org/incoming/brett-maxfield-080817.tgz Submission from: (NULL) (220.245.180.135)

Fixes bug with overlay system where it would inherit/collect attributes to the entry that was supplying those attributes, causing duplicate attributes in that node.

Also add a alternate config format for easy entry, eg old format:

overlay collect collectinfo <dn> <attribute>

and now in addition to above also supports :

overlay collect collectinfo <dn> <attribute1>,<attribute2>,<attributeN>