server: fix small mem leak of bindto_name

Change-Id: Ib9c8003e164a156f1c4d3cde47e4158d867d82c6
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4909
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

src/server/server.c

@@ -703,6 +703,8 @@ void server_free(void)
 	tcl_service_free();
 	telnet_service_free();
 	jsp_service_free();
+
+	free(bindto_name);
 }
 
 void exit_on_signal(int sig)