make multiple config instead of one implicit global

common/config/DOC/config/devusage/addaparam.md

@@ -11,7 +11,7 @@ paramdef_t someoptions[] = {
    {"opt1",  "<help opt1>",   0,      uptr:&varopt1, defuintval:0, TYPE_UINT,  0 },
 };
 
-config_get( someoptions,sizeof(someoptions)/sizeof(paramdef_t),"somesection");
+config_get( someoptions,sizeofArray(someoptions),"somesection");
 
 ```
 new code:
@@ -31,7 +31,7 @@ paramdef_t someoptions[] = {
    {"opt2",  "<help opt2>",   0,      strptr:&varopt2,defstrval:"",TYPE_STRING,0   },
 };
 
-config_get( someoptions,sizeof(someoptions)/sizeof(paramdef_t),"somesection");
+config_get( someoptions,sizeofArray(someoptions),"somesection");
 
 ```
 

common/config/DOC/config/devusage/addparamset.md

@@ -105,7 +105,7 @@ character string, used as a prefix for the section name. It has to be specified
 list to be read is under another section.
 */
   config_getlist( &NbIoT_MacRLC_ParamList,NbIoT_MacRLC_Params,
-                  sizeof(NbIoT_MacRLC_Params)/sizeof(paramdef_t),
+                  sizeofArray(NbIoT_MacRLC_Params),
                   NULL);
 
 /*