add new IPTools class; add new callback to show link to domain in domain-overview; validate possible allowed_ip-ranges in FroxlorRPC; fix possible duplicate ips for mysql-access-host in installation

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

lib/tablelisting/customer/tablelisting.domains.php

@@ -31,6 +31,7 @@ return [
 			'd.domain_ace' => [
 				'label' => $lng['domains']['domainname'],
 				'field' => 'domain_ace',
+				'callback' => [Domain::class, 'domainExternalLink'],
 			],
 			'd.documentroot' => [
 				'label' => $lng['panel']['path'],