Add VLESS-H3-Caddy two modes

VLESS-HTTP-Caddy/VLESS-H3-To-H2C-Caddy/Caddyfile

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+xx.com {
+    log {
+        level DEBUG
+    }
+    root * /var/www
+    file_server
+    tls CA.crt priv.key # 换成你的证书和私钥，绝对路径
+    
+    reverse_proxy /path h2c://127.0.0.1:2001 {
+    }
+}

VLESS-HTTP-Caddy/VLESS-H3-To-H2C-Caddy/README.md

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+# 原理图：
+Xray client <--- H3 ---> Caddy2 <--- H2C ---> Xray server
+
+注意：
+目前仅 Caddy2 的 v2.9.0-beta.2 版及以后完美支持 H3 转换 H2C 对接 Xray 的 H2C 入站。

VLESS-HTTP-Caddy/VLESS-H3-To-H2C-Caddy/client.json

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+{
+  "log":{},
+  "inbounds":[
+    {
+      "port":"1080",
+      "protocol":"socks",
+      "settings":{
+        "auth":"noauth",
+        "udp":true
+      }
+    },
+    {
+      "port":"1081",
+      "protocol":"http",
+      "settings":{}
+    }
+  ],
+  "outbounds":[
+    {
+      "protocol":"vless",
+      "settings":{
+        "vnext":[
+          {
+            "address":"xx.com",
+            "port":443,
+            "users":[
+              {
+                "id":"",
+                "encryption":"none"
+              }
+            ]
+          }
+        ]
+      },
+      "streamSettings":{
+        "network":"http",
+        "security":"tls",
+        "httpSettings":{
+          "host":[
+            "xx.com"
+          ],
+          "path":"/path"
+        },
+        "tlsSettings":{
+          "alpn":["h3"],
+          "serverName":"xx.com"
+        }
+      }
+    },
+    {
+      "tag":"direct",
+      "protocol":"freedom",
+      "settings":{}
+    },
+    {
+      "tag":"blocked",
+      "protocol":"blackhole",
+      "settings":{}
+    }
+  ],
+  "routing":{
+    "domainStrategy":"IPOnDemand",
+    "rules":[
+      {
+        "type":"field",
+        "ip":[
+          "geoip:private"
+        ],
+        "outboundTag":"direct"
+      }
+    ]
+  }
+}

VLESS-HTTP-Caddy/VLESS-H3-To-H2C-Caddy/server.json

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+{
+  "log": {
+    "loglevel": "warning"
+  },
+  "inbounds": [
+    {
+      "port": 2001,
+      "listen": "127.0.0.1",
+      "protocol": "vless",
+      "settings": {
+        "clients": [
+          {
+            "id": "",
+            "email": "love@example.com"
+          }
+        ],
+        "decryption": "none"
+      },
+      "streamSettings": {
+        "security": "none",
+        "network": "http",
+        "httpSettings": {
+          "path": "/path",
+          "host": [
+            "xx.com"
+          ]
+        }
+      }
+    }
+  ],
+  "outbounds": [
+    {
+      "tag": "direct",
+      "protocol": "freedom",
+      "settings": {}
+    },
+    {
+      "tag": "blocked",
+      "protocol": "blackhole",
+      "settings": {}
+    }
+  ],
+  "routing": {
+    "domainStrategy": "AsIs",
+    "rules": [
+      {
+        "type": "field",
+        "ip": [
+          "geoip:private"
+        ],
+        "outboundTag": "blocked"
+      }
+    ]
+  }
+}