Make autofs use the "async" flag for msdosfs and ufs filesystems mounted

on /media.

MFC after:	1 month

etc/autofs/special_media

@@ -46,6 +46,8 @@ print_map_entry() {
 			    "Cannot mount ${_fstype} formatted device /dev/${_p}: Install sysutils/fusefs-ntfs first"
 			exit 1
 		fi
+	elif [ "${_fstype}" = "msdosfs" -o "${_fstype}" = "ufs" ]; then
+		echo "-fstype=${_fstype},nosuid,async	:/dev/${_p}" 
 	else
 		echo "-fstype=${_fstype},nosuid	:/dev/${_p}" 
 	fi