move common code file in common directory

remove several unused files
remove mem_block_t that is never used in a different way than a simple heap buffer
move up IP address type and remove duplications of the same struct declaration

common/config/config_cmdline.c

@@ -35,7 +35,7 @@
 #include <stdio.h>
 #include <ctype.h>
 #include <errno.h>
-#include <platform_types.h>
+#include "common/platform_types.h"
 #include "config_userapi.h"
 #include "config_common.h"
 #include "../utils/LOG/log.h"

common/config/config_common.c

@@ -28,7 +28,7 @@
 #include <errno.h>
 #include <dlfcn.h>
 #include <arpa/inet.h>
-#include <platform_types.h>
+#include "common/platform_types.h"
 #include "config_common.h"
 #include "../utils/LOG/log.h"
 static int managed_ptr_sz(configmodule_interface_t *cfg, void *ptr)

common/config/config_load_configmodule.c

@@ -36,7 +36,7 @@
 #include <unistd.h>
 #include <errno.h>
 #include <dlfcn.h>
-#include <platform_types.h>
+#include "common/platform_types.h"
 
 #define CONFIG_LOADCONFIG_MAIN
 #include "config_load_configmodule.h"

common/config/config_userapi.c

@@ -39,7 +39,7 @@
 #include <errno.h>
 #include <dlfcn.h>
 #include <arpa/inet.h>
-#include <platform_types.h>
+#include "common/platform_types.h"
 #include "config_userapi.h"
 #include "config_common.h"
 #include "../utils/LOG/log.h"