some more filter_var for ipv4 / ipv6

interface/lib/classes/validate_database.inc.php

interface/lib/classes/validate_dns.inc.php

interface/web/dns/form/dns_a.tform.php

interface/web/dns/form/dns_aaaa.tform.php

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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