Log non-MediaWiki exceptions for requests via main entry point

Previously, non-MediaWiki exceptions were logged only for api requests,
job runner, resource loader, etc. but not for general requests
such as page views.

Bug: 61914
Change-Id: Id4de5cac0b9996a98cdaf5e73655d49fa55ea8c3

includes/exception/MWExceptionHandler.php

@@ -82,6 +82,8 @@ class MWExceptionHandler {
 			} else {
 				echo nl2br( htmlspecialchars( $message ) ) . "\n";
 			}
+
+			self::logException( $e );
 		}
 	}