Merge branch 'develop' into 'develop'

Fixed dns cname validation query

See merge request ispconfig/ispconfig3!1913

Author: Till Brehm

interface/web/dns/dns_cname_edit.php

@@ -48,7 +48,7 @@ class page_action extends dns_page_action {
 	protected function checkDuplicate() {
 		global $app;
 		//* Check for duplicates where IP and hostname are the same
-		$tmp = $app->db->queryOneRecord("SELECT count(dns_rr.id) as number FROM dns_rr LEFT JOIN dns_soa ON dns_rr.zone = dns_soa.id WHERE (( name = replace(?, concat('.', dns_soa.origin), '') or name = ? or name = concat(?,'.', dns_soa.origin)) and dns_rr.zone = ?)", $this->dataRecord["name"], $this->dataRecord["name"], $this->dataRecord["name"], $this->dataRecord["zone"], $this->dataRecord["zone"]);
+		$tmp = $app->db->queryOneRecord("SELECT count(dns_rr.id) as number FROM dns_rr LEFT JOIN dns_soa ON dns_rr.zone = dns_soa.id WHERE (( name = replace(?, concat('.', dns_soa.origin), '') or name = ? or name = concat(?,'.', dns_soa.origin)) and dns_rr.zone = ? and dns_rr.id != ?)", $this->dataRecord["name"], $this->dataRecord["name"], $this->dataRecord["name"], $this->dataRecord["zone"], $this->id);
 		if($tmp['number'] > 0) return true;
 		return false;
 	}