Better variable quoting in sql queries.

interface/lib/classes/tform.inc.php

interface/lib/classes/tform_actions.inc.php

interface/lib/classes/validate_client.inc.php

interface/lib/classes/validate_dns.inc.php

interface/lib/classes/validate_domain.inc.php

interface/web/dns/dns_a_edit.php

interface/web/dns/dns_aaaa_edit.php

interface/web/dns/dns_alias_edit.php

interface/web/dns/dns_cname_edit.php

interface/web/dns/dns_hinfo_edit.php

interface/web/dns/dns_import.php

interface/web/dns/dns_mx_edit.php

interface/web/dns/dns_ns_edit.php

interface/web/dns/dns_ptr_edit.php

interface/web/dns/dns_rp_edit.php

interface/web/dns/dns_slave_edit.php

interface/web/dns/dns_soa_edit.php

interface/web/dns/dns_srv_edit.php

interface/web/dns/dns_txt_edit.php

interface/web/dns/dns_wizard.php