More dutch language adjustment for dashboard / dns / clients / sites

interface/web/client/lib/lang/nl.lng

interface/web/client/lib/lang/nl_client_del.lng

interface/web/client/lib/lang/nl_client_message.lng

interface/web/client/lib/lang/nl_clients_list.lng

interface/web/client/lib/lang/nl_domain.lng

interface/web/client/lib/lang/nl_domain_list.lng

interface/web/client/lib/lang/nl_reseller.lng

interface/web/client/lib/lang/nl_resellers_list.lng

interface/web/dashboard/lib/lang/nl_dashlet_quota.lng

interface/web/dns/lib/lang/nl_dns_soa_admin_list.lng

interface/web/dns/lib/lang/nl_dns_soa_list.lng

interface/web/dns/lib/lang/nl_dns_wizard.lng

interface/web/sites/lib/lang/nl_web_sites_stats_list.lng

interface/web/sites/lib/lang/nl_web_vhost_domain.lng