Introduce common SQLite header

The header declares the missing v2 handle closing function for older
versions of SQLite.

include/maxscale/sqlite3.h

@@ -0,0 +1,26 @@
+#pragma once
+/*
+ * 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.
+ */
+
+#include <sqlite3.h>
+
+/**
+ * @file sqlite3.h
+ *
+ * Common SQLite defines
+ */
+
+/** SQLite3 version 3.7.14 introduced the new v2 close interface */
+#if SQLITE_VERSION_NUMBER < 3007014
+#define sqlite3_close_v2 sqlite3_close
+#endif

server/modules/authenticator/GSSAPI/GSSAPIAuth/gssapi_auth.c

@@ -18,7 +18,6 @@
 #include <maxscale/protocol/mysql.h>
 #include <maxscale/secrets.h>
 #include <maxscale/mysql_utils.h>
-#include <sqlite3.h>
 #include "../gssapi_auth.h"
 
 /** Default timeout is one minute */

server/modules/authenticator/GSSAPI/gssapi_auth.h

@@ -18,7 +18,7 @@
 #include <stdint.h>
 #include <stddef.h>
 #include <gssapi.h>
-#include <sqlite3.h>
+#include <maxscale/sqlite3.h>
 
 MXS_BEGIN_DECLS
 

server/modules/routing/avrorouter/avrorouter.h

@@ -32,16 +32,11 @@
 #include <maxscale/pcre2.h>
 #include <maxavro.h>
 #include <binlog_common.h>
-#include <sqlite3.h>
+#include <maxscale/sqlite3.h>
 #include <maxscale/protocol/mysql.h>
 
 MXS_BEGIN_DECLS
 
-/** SQLite3 version 3.7.14 introduced the new v2 close interface */
-#if SQLITE_VERSION_NUMBER < 3007014
-#define sqlite3_close_v2 sqlite3_close
-#endif
-
 /**
  * How often to call the router status function (seconds)
  */