http2 support!

[zhouhang95]

:authority: www.iwara.tv :method: GET :path: /videos :scheme: https accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8 accept-encoding: gzip, deflate, br accept-language: zh-CN,zh;q=0.9,en;q=0.8 cache-control: max-age=0 cookie: _ga=GA1.2.1875238831.1544294578; _gid=GA1.2.439789428.1547699561; has_js=1 if-none-match: "1547701402-1" upgrade-insecure-requests: 1 user-agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

[zhouhang95]

http2在header里有个伪头

[jin10086]

你可以试试哦，应该蛮简单的...等待你的pr