基础系列 30：Https
Https单双向认证
参考链接
- 1 https://www.oschina.net/translate/android-security-implementation-of-self-signed-ssl
- 2 https://www.jianshu.com/p/c55d52b2c811
- 3 https://www.jianshu.com/p/9a6c204616d2
- 4 https://www.jianshu.com/p/41bb549317ff
- 5 https://blog.csdn.net/ONS_cukuyo/article/details/79172355
