Re: (ITS#8378) idlcache in back hdb doesn't update existing caches on a subtree rename, causing bad search results

[jonathan@phillipoux.net]

The patch I originally sent works only for MODRDN operations, but causes 
a segfault on plain old ADD operations in some cases.

This is caused by the hdb_dn2id_children function trying to update dkids 
inside a non-initialised structure. I figure that if we don't have the 
structure we don't need to update it, since this function is mostly a 
"search" function. Hope that makes sense.

A new patch is here: 
ftp://www.openldap.org/incoming/openldap-dn2id-modrdn-idlcache-sub-delete-2.patch

Jonathan