net/StaticSocketAddress: add GetLocalRaw()

src/net/StaticSocketAddress.hxx

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012-2017 Max Kellermann <max.kellermann@gmail.com>
+ * Copyright 2012-2019 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
@@ -109,6 +109,14 @@ public:
 		address.ss_family = AF_UNSPEC;
 	}
 
+#ifdef HAVE_UN
+	/**
+	 * @see SocketAddress::GetLocalRaw()
+	 */
+	gcc_pure
+	StringView GetLocalRaw() const noexcept;
+#endif
+
 #ifdef HAVE_TCP
 	/**
 	 * Extract the port number.  Returns 0 if not applicable.