feat(plugin): add HTTP2HTTPS redirect plugin implementation

conf/frpc_full_example.toml

@@ -370,6 +370,15 @@ localAddr = "127.0.0.1:443"
 hostHeaderRewrite = "127.0.0.1"
 requestHeaders.set.x-from-where = "frp"
 
+[[proxies]]
+name = "plugin_http2https_redirect"
+type = "http"
+customDomains = ["test.yourdomain.com"]
+[proxies.plugin]
+type = "http2https_redirect"
+# Optional. Defaults to 443. Set this if the HTTPS entry is exposed on a non-standard port.
+# httpsPort = 443
+
 [[proxies]]
 name = "plugin_http2http"
 type = "tcp"