optimize: usa重命名为cloudflare后，向下兼容原来的usa配置。

packages/mitmproxy/test/dnsSpeedTest.js

@@ -0,0 +1,38 @@
+const SpeedTester = require('../src/lib/speed/SpeedTester.js')
+const SpeedTest = require('../src/lib/speed/index.js')
+const dns = require('../src/lib/dns/index.js')
+
+const dnsMap = dns.initDNS({
+  // ipaddress: {
+  //   type: 'ipaddress',
+  //   server: 'ipaddress',
+  //   cacheSize: 1000
+  // },
+  cloudflare: {
+    type: 'https',
+    server: 'https://1.1.1.1/dns-query',
+    cacheSize: 1000
+  }
+  // py233: { //污染
+  //   type: 'https',
+  //   server: ' https://i.233py.com/dns-query',
+  //   cacheSize: 1000
+  // }
+  // google: { //不可用
+  //   type: 'https',
+  //   server: 'https://8.8.8.8/dns-query',
+  //   cacheSize: 1000
+  // },
+  // dnsSB: { //不可用
+  //   type: 'https',
+  //   server: 'https://doh.dns.sb/dns-query',
+  //   cacheSize: 1000
+  // }
+})
+
+SpeedTest.initSpeedTest({ hostnameList: {}, dnsMap })
+
+const tester = new SpeedTester({ hostname: 'github.com' })
+tester.test().then(ret => {
+  console.log(tester.alive)
+})