mail/snappymail: Fix error while accessing admin page

On a fresh installation, the admin page returns a 500 error, indicating
a web server error. The logs reveal what the problem is, which is already
fixed in upstream [1], but until a new version of snappymail is released,
the user will see the following error:

```
RainLoop\Config\Application::SetPassword(): Argument #1 ($oPassword) must be of type SnappyMail\SensitiveString, string given, called in /usr/local/www/snappymail/snapp
ymail/v/2.35.2/app/libraries/RainLoop/Actions.php on line 672
```

Reference:	the-djmaze/snappymail#1472 [1]
PR:		277571
MFH:		2024Q1

mail/snappymail/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	snappymail
 DISTVERSION=	2.35.2
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	mail www
 MASTER_SITES=	https://github.com/the-djmaze/snappymail/releases/download/v${DISTVERSION}/
 PKGNAMESUFFIX=	${PHP_PKGNAMESUFFIX}

mail/snappymail/files/patch-snappymail_v_2.35.2_app_libraries_RainLoop_Actions.php

@@ -0,0 +1,11 @@
+--- snappymail/v/2.35.2/app/libraries/RainLoop/Actions.php.orig	2024-03-08 05:14:45 UTC
++++ snappymail/v/2.35.2/app/libraries/RainLoop/Actions.php
+@@ -668,7 +668,7 @@ class Actions
+ 					$sPassword = \substr(\base64_encode(\random_bytes(16)), 0, 12);
+ 					Utils::saveFile($passfile, $sPassword . "\n");
+ //					\chmod($passfile, 0600);
+-					$oConfig->SetPassword($sPassword);
++					$oConfig->SetPassword(new \SnappyMail\SensitiveString($sPassword));
+ 					$oConfig->Save();
+ 				}
+ 			}