(ITS#5093) slap_mods_opattrs() doesn't work with modrdn

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: HEAD/re24
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (82.63.140.131)
Submitted by: ando


I've noticed that in HEAD modifyTimestamp and entryCSN do not change over
modrdn.  The reason is subtle, because slap_mods_opattrs() expects to be called
with Operation's o_request data for a modify and not for modrdn, which misses
the rs_no_opattrs member.  I've reworked things to better preserve modification
consistency in the future.

p.