Send IV_LZO only if supported

TunnelKit/Sources/Core/CoreConfiguration.swift

@@ -77,17 +77,22 @@ struct CoreConfiguration {
 
     // MARK: Authentication
     
-    static let peerInfo = [
+    static let peerInfo: String = {
+        var info = [
             "IV_VER=2.4",
             "IV_PLAT=mac",
             "IV_UI_VER=\(identifier) \(version)",
             "IV_PROTO=2",
             "IV_NCP=2",
             "IV_SSL=\(CryptoBox.version())",
-        "IV_LZO=1",
             "IV_LZO_STUB=1",
-        ""
-    ].joined(separator: "\n")
+        ]
+        if LZOIsSupported() {
+            info.append("IV_LZO=1")
+        }
+        info.append("")
+        return info.joined(separator: "\n")
+    }()
     
     static let randomLength = 32