mail/snappymail: Add missing ctype extension

When the user first logs in to its web server with snappymail installed, the first
thing it will see is:

```
[302] The following PHP extensions are not available in your PHP configuration!

    ctype
```

PR:		277570
MFH:		2024Q1

mail/snappymail/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	snappymail
 DISTVERSION=	2.35.2
+PORTREVISION=	1
 CATEGORIES=	mail www
 MASTER_SITES=	https://github.com/the-djmaze/snappymail/releases/download/v${DISTVERSION}/
 PKGNAMESUFFIX=	${PHP_PKGNAMESUFFIX}
@@ -14,8 +15,8 @@ RUN_DEPENDS=	${PECL_PKGNAMEPREFIX}APCu>0:devel/pecl-APCu@${PHP_FLAVOR} \
 		${PECL_PKGNAMEPREFIX}uuid>0:devel/pecl-uuid@${PHP_FLAVOR}
 
 USES=		php:web,flavors
-USE_PHP=	curl dom fileinfo gd iconv intl mbstring phar sodium tidy xml \
-		zip zlib
+USE_PHP=	ctype curl dom fileinfo gd iconv intl mbstring phar sodium tidy \
+		xml zip zlib
 
 NO_ARCH=	yes
 NO_BUILD=	yes