Merge branch '6533-domain-module-prevents-subdomains-to-be-added-for-domains-that-exist-as-website' into 'develop'

Resolve "Domain module prevents subdomains to be added for domains that exist as website"

Closes #6533

See merge request ispconfig/ispconfig3!1770

Author: Till Brehm

interface/web/sites/web_childdomain_edit.php

@@ -105,7 +105,7 @@ function onShowEnd() {
 			/*
 			 * The domain-module is in use.
 			*/
-			$domains = $app->tools_sites->getDomainModuleDomains($this->_vhostdomain_type == 'subdomain' ? null : "web_domain", $this->dataRecord['domain']);
+			$domains = $app->tools_sites->getDomainModuleDomains($this->_vhostdomain_type == 'subdomain' ? null : "web_domain");
 			$domain_select = "<option value=''></option>";
 			$selected_domain = '';
 			if(is_array($domains) && sizeof($domains) > 0) {