Minor Patch: Respect browse-url-new-window-flag

[T. V. Raman]

Here is a simple patch to eww.el to respect option
browse-url-new-window-flag
git diff master -- eww.el
diff --git a/lisp/net/eww.el b/lisp/net/eww.el
index 2059b5e..4613b4c 100644
--- a/lisp/net/eww.el
+++ b/lisp/net/eww.el
@@ -680,7 +680,7 @@ the like."
 
 ;;;###autoload
 (defun eww-browse-url (url &optional new-window)
-  (cond (new-window
+  (cond ((or browse-url-new-window-flagnew-window)
          (let ((new-buffer "*eww*")
                (num 0))
            (while (get-buffer new-buffer)