Removed backend for old Android frontend patch

Moved the remaining DNS handler to a new plugin.

src/libcharon/plugins/android_dns/android_dns_plugin.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2010-2013 Tobias Brunner
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "android_dns_plugin.h"
+#include "android_dns_handler.h"
+
+#include <hydra.h>
+#include <daemon.h>
+
+typedef struct private_android_dns_plugin_t private_android_dns_plugin_t;
+
+/**
+ * Private data of an android_dns_plugin_t object.
+ */
+struct private_android_dns_plugin_t {
+
+	/**
+	 * Public interface
+	 */
+	android_dns_plugin_t public;
+
+	/**
+	 * Android specific DNS handler
+	 */
+	android_dns_handler_t *handler;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_android_dns_plugin_t *this)
+{
+	return "android-dns";
+}
+
+METHOD(plugin_t, destroy, void,
+	private_android_dns_plugin_t *this)
+{
+	hydra->attributes->remove_handler(hydra->attributes,
+									  &this->handler->handler);
+	this->handler->destroy(this->handler);
+	free(this);
+}
+
+/**
+ * See header
+ */
+plugin_t *android_dns_plugin_create()
+{
+	private_android_dns_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.reload = (void*)return_false,
+				.destroy = _destroy,
+			},
+		},
+		.handler = android_dns_handler_create(),
+	);
+
+	hydra->attributes->add_handler(hydra->attributes, &this->handler->handler);
+
+	return &this->public.plugin;
+}