Add license headers

Author: aryan-25

Sources/HTTPServer/NIOHTTPServer+ListeningAddress.swift

@@ -1,3 +1,16 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift HTTP Server open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift HTTP Server project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
 import NIOConcurrencyHelpers
 import NIOCore
 import NIOPosix

Sources/HTTPServer/NIOHTTPServer.swift

@@ -1,3 +1,16 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift HTTP Server open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift HTTP Server project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
 public import Logging
 import HTTPTypes
 import NIOCertificateReloading

Sources/HTTPServer/SocketAddress.swift

@@ -1,3 +1,16 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift HTTP Server open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift HTTP Server project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
 import NIOCore
 
 /// Represents an IPv4 address.

Tests/HTTPServerTests/NIOHTTPServerTests.swift

@@ -1,3 +1,16 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift HTTP Server open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift HTTP Server project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
 @testable import HTTPServer
 import HTTPTypes
 import Logging