consistency in declaring service symbols

libservices/HOWTO

@@ -76,7 +76,7 @@ it should also declare all the accompanying data structures, as necessary
 ==================================================================
   /* GPL header */
   #include <service_versions.h>
-  SERVICE_VERSION *foo_service= (void*)VERSION_foo;
+  SERVICE_VERSION foo_service= (void*)VERSION_foo;
 ==================================================================
 
 7. add the new file to libservices/CMakeLists.txt (MYSQLSERVICES_SOURCES)

libservices/debug_sync_service.c

@@ -15,4 +15,4 @@
 */
 
 #include <service_versions.h>
-SERVICE_VERSION *debug_sync_service= (void*)VERSION_debug_sync;
+SERVICE_VERSION debug_sync_service= (void*)VERSION_debug_sync;

libservices/progress_report_service.c

@@ -14,4 +14,4 @@
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
 #include <service_versions.h>
-SERVICE_VERSION *progress_report_service= (void*)VERSION_progress_report;
+SERVICE_VERSION progress_report_service= (void*)VERSION_progress_report;

libservices/thd_alloc_service.c

@@ -15,4 +15,4 @@
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
 #include <service_versions.h>
-SERVICE_VERSION *thd_alloc_service= (void*)VERSION_thd_alloc;
+SERVICE_VERSION thd_alloc_service= (void*)VERSION_thd_alloc;

libservices/thd_wait_service.c

@@ -16,4 +16,4 @@
 */
 
 #include <service_versions.h>
-SERVICE_VERSION *thd_wait_service= (void*)VERSION_thd_wait;
+SERVICE_VERSION thd_wait_service= (void*)VERSION_thd_wait;