Fix: A log handler can be loaded twice.

htdocs/core/class/conf.class.php

@@ -454,7 +454,7 @@ class Conf
         		throw new Exception('Log handler does not extend LogHandlerInterface');
         	}
 
-        	$this->loghandlers[]=$loghandlerinstance;
+        	$this->loghandlers[$handler]=$loghandlerinstance;
         }
 	}
 }

htdocs/install/etape5.php

@@ -142,6 +142,10 @@ if ($action == "set" || empty($action) || preg_match('/upgrade/i',$action))
 
     $db=getDoliDBInstance($conf->db->type,$conf->db->host,$conf->db->user,$conf->db->pass,$conf->db->name,$conf->db->port);
 
+    // Create the global $hookmanager object
+    include_once DOL_DOCUMENT_ROOT.'/core/class/hookmanager.class.php';
+    $hookmanager=new HookManager($db);
+        
     $ok = 0;
 
     // If first install

htdocs/install/inc.php

@@ -228,7 +228,7 @@ foreach ($handlers as $handler)
 		throw new Exception('Log handler does not extend LogHandlerInterface');
 	}
 
-	$conf->loghandlers[]=$loghandlerinstance;
+	if (empty($conf->loghandlers[$handler])) $conf->loghandlers[$handler]=$loghandlerinstance;
 }
 
 
@@ -331,8 +331,8 @@ function conf($dolibarr_main_document_root)
     	{
     		throw new Exception('Log handler does not extend LogHandlerInterface');
     	}
-    
-    	$conf->loghandlers[]=$loghandlerinstance;
+
+		if (empty($conf->loghandlers[$handler])) $conf->loghandlers[$handler]=$loghandlerinstance;
     }
     
     return 1;