reset SlapReply flags

servers/slapd/back-dnssrv/search.c

servers/slapd/back-ldap/search.c

servers/slapd/back-ldbm/search.c

servers/slapd/back-meta/search.c

servers/slapd/back-monitor/search.c

servers/slapd/back-passwd/search.c

servers/slapd/back-perl/search.c

servers/slapd/back-shell/result.c

servers/slapd/back-sql/search.c

servers/slapd/sessionlog.c

servers/slapd/slapi/slapi_ops.c

servers/slapd/slapi/slapi_utils.c