Sync with HEAD

clients/tools/ldapsearch.c

include/ldap.h

libraries/libldap/request.c

libraries/libldap/search.c

libraries/libldap/test.c

libraries/libldap/url.c

servers/slapd/backend.c

servers/slapd/backglue.c

servers/slapd/config.c

servers/slapd/root_dse.c

servers/slapd/saslauthz.c

servers/slapd/search.c

servers/slapd/slap.h