我按照stunnel: SSL-to-SSL? （对于 smtp/imap） 并具有以下配置文件：
cert = /home/marshall/stunnels/certs/umistunnel.keys
; protocol version (all, SSLv2, SSLv3, TLSv1)
sslVersion = SSLv3
pid = ./stunnel4.pid
[https]
accept = 4433
connect = 3000
当我跑
> stunnel config.conf
我得到的错误是：
Reading configuration from descriptor 3
Snagged 64 random bytes from /home/marshall/.rnd
Wrote 1024 new random bytes to /home/marshall/.rnd
PRNG seeded successfully
Line 1: End of section stunnel: SSL server needs a certificate
如果我改为运行：
> stunnel filethatdoesnotexist.asdf
我得到相同的结果。而且，如果我在没有任何参数的情况下运行 stunnel，唯一的变化是错误指出第 0 行。我在这里做错了什么？