Turn on lexical-binding in some url libs

* lisp/url/url-auth.el:
* lisp/url/url-expand.el:
* lisp/url/url-future.el:
* lisp/url/url-parse.el:
* lisp/url/url-util.el: Turn on lexical-binding.

lisp/url/url-auth.el

@@ -1,4 +1,4 @@
-;;; url-auth.el --- Uniform Resource Locator authorization modules
+;;; url-auth.el --- Uniform Resource Locator authorization modules -*- lexical-binding: t -*-
 
 ;; Copyright (C) 1996-1999, 2004-2016 Free Software Foundation, Inc.
 
@@ -53,7 +53,7 @@ lists.  The first assoc list is keyed by the server name.  The cdr of
 this is an assoc list based on the \"directory\" specified by the URL we
 are looking up.")
 
-(defun url-basic-auth (url &optional prompt overwrite realm args)
+(defun url-basic-auth (url &optional prompt overwrite realm _args)
   "Get the username/password for the specified URL.
 If optional argument PROMPT is non-nil, ask for the username/password
 to use for the url and its descendants.  If optional third argument

lisp/url/url-expand.el

@@ -1,4 +1,4 @@
-;;; url-expand.el --- expand-file-name for URLs
+;;; url-expand.el --- expand-file-name for URLs -*- lexical-binding: t -*-
 
 ;; Copyright (C) 1999, 2004-2016 Free Software Foundation, Inc.
 

lisp/url/url-future.el

@@ -1,4 +1,4 @@
-;;; url-future.el --- general futures facility for url.el
+;;; url-future.el --- general futures facility for url.el -*- lexical-binding: t -*-
 
 ;; Copyright (C) 2011-2016 Free Software Foundation, Inc.
 

lisp/url/url-parse.el

@@ -1,4 +1,4 @@
-;;; url-parse.el --- Uniform Resource Locator parser
+;;; url-parse.el --- Uniform Resource Locator parser -*- lexical-binding: t -*-
 
 ;; Copyright (C) 1996-1999, 2004-2016 Free Software Foundation, Inc.
 

lisp/url/url-util.el

@@ -1,4 +1,4 @@
-;;; url-util.el --- Miscellaneous helper routines for URL library
+;;; url-util.el --- Miscellaneous helper routines for URL library -*- lexical-binding: t -*-
 
 ;; Copyright (C) 1996-1999, 2001, 2004-2016 Free Software Foundation,
 ;; Inc.