net/Resolver: update copyright year

src/net/AddressInfo.cxx

 /*
- * Copyright (C) 2016-2017 Max Kellermann <max.kellermann@gmail.com>
+ * Copyright 2016-2018 Max Kellermann <max.kellermann@gmail.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/net/AddressInfo.hxx

 /*
- * Copyright (C) 2016-2017 Max Kellermann <max.kellermann@gmail.com>
+ * Copyright 2016-2018 Max Kellermann <max.kellermann@gmail.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/net/HostParser.cxx

 /*
- * Copyright 2007-2017 Content Management AG
+ * Copyright 2007-2018 Content Management AG
  * All rights reserved.
  *
  * author: Max Kellermann <mk@cm4all.com>

src/net/HostParser.hxx

 /*
- * Copyright 2007-2017 Content Management AG
+ * Copyright 2007-2018 Content Management AG
  * All rights reserved.
  *
  * author: Max Kellermann <mk@cm4all.com>

src/net/Resolver.cxx

 /*
- * Copyright 2007-2017 Content Management AG
+ * Copyright 2007-2018 Content Management AG
  * All rights reserved.
  *
  * author: Max Kellermann <mk@cm4all.com>

src/net/Resolver.hxx

 /*
- * Copyright 2007-2017 Content Management AG
+ * Copyright 2007-2018 Content Management AG
  * All rights reserved.
  *
  * author: Max Kellermann <mk@cm4all.com>