Move headers from server/include to include/maxscale

- Headers now to be included as <maxscale/xyz.h>
- First step, no cleanup of headers has been made. Only moving
  from one place to another + necessary modifications.

include/maxscale/listener.h

@@ -0,0 +1,68 @@
+#ifndef _LISTENER_H
+#define _LISTENER_H
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl.
+ *
+ * Change Date: 2019-07-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+/**
+ * @file listener.h
+ *
+ * The listener definitions for MaxScale
+ *
+ * @verbatim
+ * Revision History
+ *
+ * Date         Who                     Description
+ * 19/01/16     Martin Brampton         Initial implementation
+ *
+ * @endverbatim
+ */
+
+#include <maxscale/gw_protocol.h>
+#include <maxscale/gw_ssl.h>
+#include <maxscale/hashtable.h>
+
+struct dcb;
+struct service;
+
+/**
+ * The servlistener structure is used to link a service to the protocols that
+ * are used to support that service. It defines the name of the protocol module
+ * that should be loaded to support the client connection and the port that the
+ * protocol should use to listen for incoming client connections.
+ */
+typedef struct servlistener
+{
+    char *name;                 /**< Name of the listener */
+    char *protocol;             /**< Protocol module to load */
+    unsigned short port;        /**< Port to listen on */
+    char *address;              /**< Address to listen with */
+    char *authenticator;        /**< Name of authenticator */
+    void *auth_instance;        /**< Authenticator instance created in GWAUTHENTICATOR::initialize() */
+    SSL_LISTENER *ssl;          /**< Structure of SSL data or NULL */
+    struct dcb *listener;       /**< The DCB for the listener */
+    struct users *users;        /**< The user data for this listener */
+    HASHTABLE *resources;       /**< hastable for listener resources, i.e. database names */
+    struct service* service;    /**< The service which used by this listener */
+    SPINLOCK lock;
+    struct  servlistener *next; /**< Next service protocol */
+} SERV_LISTENER;
+
+SERV_LISTENER *listener_alloc(struct service* service, char *name, char *protocol,
+                              char *address, unsigned short port, char *authenticator,
+                              char* options, SSL_LISTENER *ssl);
+void listener_free(SERV_LISTENER* listener);
+int listener_set_ssl_version(SSL_LISTENER *ssl_listener, char* version);
+void listener_set_certificates(SSL_LISTENER *ssl_listener, char* cert, char* key, char* ca_cert);
+int listener_init_SSL(SSL_LISTENER *ssl_listener);
+
+#endif