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

examples/provider/local.json

@@ -0,0 +1,64 @@
+{
+  "log": {
+    "level": "info"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "mixed",
+      "tag": "mixed-in",
+      "listen_port": 7897
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    // A "selector" group that pulls all of its members from the
+    // outbound provider tagged "my-local". The provider parses the
+    // file at "path" on every change (fswatch-based hot reload).
+    {
+      "type": "selector",
+      "tag": "proxy",
+      "outbounds": [
+        "direct"
+      ],
+      "providers": [
+        "my-local"
+      ],
+      "default": "direct",
+      "interrupt_exist_connections": true
+    }
+  ],
+  "providers": [
+    {
+      "type": "local",
+      "tag": "my-local",
+      // Subscription file. Supported formats are auto-detected:
+      //   - sing-box JSON ({ "outbounds": [...] })
+      //   - Clash YAML
+      //   - SIP008 (shadowsocks)
+      //   - Raw shareable links (vless://, vmess://, ss://, trojan://, ...)
+      "path": "subscriptions/my-sub.txt",
+      "health_check": {
+        "enabled": true,
+        "url": "https://www.gstatic.com/generate_204",
+        "interval": "5m",
+        "timeout": "5s"
+      }
+    }
+  ],
+  "route": {
+    "final": "proxy",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}