libcli/auth: Ensure that the dns_names in/out parameter is preserved

libcli/auth: Ensure that the dns_names in/out parameter is preserved

This is in dcerpc_netr_DsrUpdateReadOnlyServerDnsRecords, which has
status variables filled in by the server and placed in this in/out
array.

This showed up as a segfault in winbindd during RODC DNS update.

Andrew Bartlett

Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Pair-programmed-with: Garming Sam <garming@catalyst.net.nz>