New: hookmanager class is used frequently and is a factory object, so we

can move it during init of environment and use it globally.

htdocs/comm/list.php

@@ -58,8 +58,6 @@ $search_categ = GETPOST("search_categ",'int');
 $catid        = GETPOST("catid",'int');
 
 // Initialize technical object to manage hooks of thirdparties. Note that conf->hooks_modules contains array array
-include_once DOL_DOCUMENT_ROOT.'/core/class/hookmanager.class.php';
-$hookmanager=new HookManager($db);
 $hookmanager->initHooks(array('customerlist'));