Merge in latest from -current.

CHANGES

INSTALL

clients/ud/string_to_key.c

libraries/liblthread/Makefile.in

libraries/liblthread/rdwr.c

libraries/liblthread/thread.c

servers/slapd/acl.c

servers/slapd/add.c

servers/slapd/back-ldbm/add.c

servers/slapd/back-ldbm/bind.c

servers/slapd/back-ldbm/cache.c

servers/slapd/back-ldbm/compare.c

servers/slapd/back-ldbm/delete.c

servers/slapd/back-ldbm/dn2id.c

servers/slapd/back-ldbm/group.c

servers/slapd/back-ldbm/id2entry.c

servers/slapd/back-ldbm/kerberos.c

servers/slapd/back-ldbm/modify.c

servers/slapd/back-ldbm/modrdn.c

servers/slapd/back-ldbm/proto-back-ldbm.h