Fixed: FS#2954 - Add minimum ttl values in all dns sub records

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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