in changelog under the stress

https://fedorahosted.org/389/ticket/359

Fix description:
. csnplRollUp (csnpl.c) - To get the first committed csndata, if
  there are preceded uncommitted csn's in the csnpl list, this
  patch skips them and returns the first committed csn.
. llistRemoveCurrentAndGetNext (llist.c) - when the last item
  in the list is removed, tail pointer is initialized, too.
. ldbm_back_add, ldbm_back_modrdn (ldbm_add.c, ldbm_modrdn.c) -
  make sure SLAPI_RESULT_CODE and SLAPI_PLUGIN_OPRETURN are set
  not just when the transaction is started, but in general.
  If an error occurs the RESULT_CODE triggers to remove the CSN
  from the RUV element.
. plugin_call_func (plugin.c) - when the plugin type is be pre/
  post op, respect the fatal error code (-1) instead of OR the
  results from all the plugins.  The error code -1 is checked
  in ldap_back_add and ldbm_back_modrdn to distinguish from the
  URP operation bits.

Ported commit f0f74b57f81998a325dc7472b9ea9b44c5ff6439.
(cherry picked from commit ed1ebf66451a16144563d2d3d636fee6451009a4)