monwf

Results 3 issues of monwf

![image](https://user-images.githubusercontent.com/1267050/99750110-c047b100-2b1a-11eb-80a0-d8fd728ad6fd.png)

enhancement
help wanted

当hostname为`*.foo.com` 这种时,直接报错,因为写key和crt时文件名包含\*,手动指定文件名后生成的证书能正常使用

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