MFH:- Fixed bug #45568 (ISAPI does not property clear auth_digest in header).

Author: Jani Taskinen

sapi/isapi/php5isapi.c

@@ -712,6 +712,7 @@ DWORD WINAPI HttpFilterProc(PHTTP_FILTER_CONTEXT pfc, DWORD notificationType, LP
 		case SF_NOTIFY_PREPROC_HEADERS:
 			SG(request_info).auth_user = NULL;
 			SG(request_info).auth_password = NULL;
+			SG(request_info).auth_digest = NULL;
 			break;
 		case SF_NOTIFY_AUTHENTICATION: {
 				char *auth_user = ((HTTP_FILTER_AUTHENT *) pvNotification)->pszUser;
@@ -746,7 +747,7 @@ static void init_request_info(LPEXTENSION_CONTROL_BLOCK lpECB TSRMLS_DC)
 	SG(request_info).content_length = lpECB->cbTotalBytes;
 	SG(sapi_headers).http_response_code = 200;  /* I think dwHttpStatusCode is invalid at this stage -RL */
 	if (!bFilterLoaded) { /* we don't have valid ISAPI Filter information */
-		SG(request_info).auth_user = SG(request_info).auth_password = NULL;
+		SG(request_info).auth_user = SG(request_info).auth_password = SG(request_info).auth_digest = NULL;
 	}
 
 #ifdef WITH_ZEUS