Fix new phpstan errors

plugins/enigma/tests/EnigmaEngineTest.php

@@ -18,7 +18,7 @@ class EnigmaEngineTest extends TestCase
 
         $engine->password_handler();
 
-        $this->assertTrue(!array_key_exists('enigma_pass', $_SESSION));
+        $this->assertFalse(array_key_exists('enigma_pass', $_SESSION)); // @phpstan-ignore-line
         $this->assertSame([], $engine->get_passwords());
 
         $_POST = ['_keyid' => 'abc', '_passwd' => '123<a>456'];
@@ -26,7 +26,7 @@ class EnigmaEngineTest extends TestCase
         $time = time();
         $engine->password_handler();
 
-        $store = unserialize($rcube->decrypt($_SESSION['enigma_pass']));
+        $store = unserialize($rcube->decrypt($_SESSION['enigma_pass'])); // @phpstan-ignore-line
 
         $this->assertCount(2, $store['ABC']);
         $this->assertSame('123<a>456', $store['ABC'][0]);

plugins/http_authentication/http_authentication.php

@@ -41,9 +41,7 @@ class http_authentication extends rcube_plugin
                 $this->redirect_query = $_SERVER['QUERY_STRING'];
             }
             // Set user password in session (see shutdown() method for more info)
-            elseif (!empty($_SESSION['user_id']) && empty($_SESSION['password'])
-                 && !empty($_SERVER['PHP_AUTH_PW'])
-            ) {
+            elseif (empty($_SESSION['password']) && !empty($_SERVER['PHP_AUTH_PW'])) {
                 $_SESSION['password'] = $rcmail->encrypt($_SERVER['PHP_AUTH_PW']);
             }
         }

plugins/krb_authentication/krb_authentication.php

@@ -63,11 +63,8 @@ class krb_authentication extends rcube_plugin
                 $args['host'] = rcube_utils::idn_to_ascii(rcube_utils::parse_host($host));
             }
 
-            if (!empty($_SERVER['REMOTE_USER'])) {
             $args['user'] = $_SERVER['REMOTE_USER'];
             $args['pass'] = null;
-            }
-
             $args['cookiecheck'] = false;
             $args['valid'] = true;
         }

program/lib/Roundcube/rcube_csv2vcard.php

@@ -660,7 +660,8 @@ class rcube_csv2vcard
             }
         }
 
-        if (!empty($contact['gender']) && ($gender = strtolower($contact['gender']))) {
+        if (!empty($contact['gender'])) {
+            $gender = strtolower($contact['gender']);
             if (!in_array($gender, ['male', 'female'])) {
                 unset($contact['gender']);
             }

program/lib/Roundcube/rcube_ldap.php

@@ -688,9 +688,9 @@ class rcube_ldap extends rcube_addressbook
             $attrs = [];
 
             foreach ((array) $entry['objectclass'] as $objectclass) {
-                if (($member_attr = $this->get_group_member_attr([$objectclass], ''))
-                    && ($member_attr = strtolower($member_attr)) && !in_array($member_attr, $attrs)
-                ) {
+                $member_attr = $this->get_group_member_attr([$objectclass], '');
+                $member_attr = $member_attr ? strtolower($member_attr) : null;
+                if ($member_attr && !in_array($member_attr, $attrs)) {
                     $members = $this->_list_group_members($dn, $entry, $member_attr, $count);
                     $group_members = array_merge($group_members, $members);
                     $attrs[] = $member_attr;