Assume entry was deleted from underneath the dn2entry call,  hence
processing is same as if NOID had been returned.

Introduction of ldbm_datum_init().
Patch for non-NULL pointer test befor call to ldbm_datum_free().

if strdup fails.  This is better than not checking, but we should
add orderly shutdown.

Modified users of this code to free matched if set.

Most function and variable definitions are now preceded by its extern
definition, for error checking.  Retyped a number of functions, usually
to return void.  Fixed a number of printf format errors.

API changes (in ldap/include):
  Added avl_dup_ok, avl_prefixapply, removed ber_fatten (probably typo
  for ber_flatten), retyped ldap_sort_strcasecmp, grew lutil.h.

A number of `extern' declarations are left (some added by protoize), to
be cleaned away later.  Mostly strdup(), strcasecmp(), mktemp(), optind,
optarg, errno.

Change backend struct option to li_dbcachewsync.

	Derived from public posting to ldap@umich.edu
	by Kurt Spanier <kurt.spanier@zdv.uni-tuebingen.de>
	See Make-common.dist for DB2 options