Add Spanish language, gracias a NTHINGs!

data/web/inc/header.inc.php

@@ -45,6 +45,7 @@
 					<ul class="dropdown-menu" role="menu">
 						<li <?=($_SESSION['mailcow_locale'] == 'de') ? 'class="active"' : ''?>> <a href="?<?= http_build_query(array_merge($_GET, array("lang" => "de"))) ?>"><span class="lang-xs lang-lbl-full" lang="de"></span></a></li>
 						<li <?=($_SESSION['mailcow_locale'] == 'en') ? 'class="active"' : ''?>> <a href="?<?= http_build_query(array_merge($_GET, array("lang" => "en"))) ?>"><span class="lang-xs lang-lbl-full" lang="en"></span></a></li>
+						<li <?=($_SESSION['mailcow_locale'] == 'es') ? 'class="active"' : ''?>> <a href="?<?= http_build_query(array_merge($_GET, array("lang" => "es"))) ?>"><span class="lang-xs lang-lbl-full" lang="es"></span></a></li>
 						<li <?=($_SESSION['mailcow_locale'] == 'nl') ? 'class="active"' : ''?>> <a href="?<?= http_build_query(array_merge($_GET, array("lang" => "nl"))) ?>"><span class="lang-xs lang-lbl-full" lang="nl"></span></a></li>
 						<li <?=($_SESSION['mailcow_locale'] == 'pt') ? 'class="active"' : ''?>> <a href="?<?= http_build_query(array_merge($_GET, array("lang" => "pt"))) ?>"><span class="lang-xs lang-lbl-full" lang="pt"></span></a></li>
 					</ul>

data/web/inc/prerequisites.inc.php

@@ -59,6 +59,10 @@ if (isset($_COOKIE['language'])) {
 			$_SESSION['mailcow_locale'] = 'en';
 			setcookie('language', 'en');
 		break;
+		case "es":
+			$_SESSION['mailcow_locale'] = 'es';
+			setcookie('language', 'es');
+		break;
 		case "nl":
 			$_SESSION['mailcow_locale'] = 'nl';
 			setcookie('language', 'nl');
@@ -79,6 +83,10 @@ if (isset($_GET['lang'])) {
 			$_SESSION['mailcow_locale'] = 'en';
 			setcookie('language', 'en');
 		break;
+		case "es":
+			$_SESSION['mailcow_locale'] = 'es';
+			setcookie('language', 'es');
+		break;
 		case "nl":
 			$_SESSION['mailcow_locale'] = 'nl';
 			setcookie('language', 'nl');

data/web/index.php

@@ -48,6 +48,7 @@ $_SESSION['return_to'] = $_SERVER['REQUEST_URI'];
 								<ul class="dropdown-menu">
 									<li <?=($_SESSION['mailcow_locale'] == 'de') ? 'class="active"' : ''?>><a href="?<?= http_build_query(array_merge($_GET, array("lang" => "de"))) ?>"><span class="lang-xs lang-lbl-full" lang="de"></span></a></li>
 									<li <?=($_SESSION['mailcow_locale'] == 'en') ? 'class="active"' : ''?>><a href="?<?= http_build_query(array_merge($_GET, array("lang" => "en"))) ?>"><span class="lang-xs lang-lbl-full" lang="en"></span></a></li>
+									<li <?=($_SESSION['mailcow_locale'] == 'es') ? 'class="active"' : ''?>><a href="?<?= http_build_query(array_merge($_GET, array("lang" => "es"))) ?>"><span class="lang-xs lang-lbl-full" lang="es"></span></a></li>
 									<li <?=($_SESSION['mailcow_locale'] == 'nl') ? 'class="active"' : ''?>><a href="?<?= http_build_query(array_merge($_GET, array("lang" => "nl"))) ?>"><span class="lang-xs lang-lbl-full" lang="nl"></span></a></li>
 									<li <?=($_SESSION['mailcow_locale'] == 'pt') ? 'class="active"' : ''?>><a href="?<?= http_build_query(array_merge($_GET, array("lang" => "pt"))) ?>"><span class="lang-xs lang-lbl-full" lang="pt"></span></a></li>
 								</ul>