ssl证书申请报错：challenge = [c for c in authorization['challenges'] if c['type'] == "http-01"][0] IndexError: list index out of range

使用acme-tiny申请ssl证书时报错：challenge = [c for c in authorization['challenges'] if c['type'] == "http-01"][0] IndexError: list index out of range
原因：ACME不支持 *.xxx.com 通用域名，必须指定 a.xxx.com, b.xxx.com（DNS-01 challenge支持通配符）

参考：https://github.com/diafygi/acme-tiny/issues/213