Add new admin panel, failover, dns fallback, providers, limiters. Update XHTTP

examples/failover/server.json

@@ -0,0 +1,58 @@
+{
+  "log": {
+    "level": "info"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      // The "failover" inbound wraps several listeners. If any of them
+      // panics or fails to accept, the parent supervises and restarts it
+      // automatically without affecting the rest of the box.
+      "type": "failover",
+      "inbounds": [
+        {
+          "type": "mixed",
+          "tag": "socks-in-1",
+          "listen": "0.0.0.0",
+          "listen_port": 10001
+        },
+        {
+          "type": "mixed",
+          "tag": "socks-in-2",
+          "listen": "0.0.0.0",
+          "listen_port": 10002
+        },
+        {
+          "type": "vless",
+          "tag": "vless-in",
+          "listen": "0.0.0.0",
+          "listen_port": 8443,
+          "users": [
+            {
+              "name": "user",
+              "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    }
+  ],
+  "route": {
+    "final": "direct",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}