(require): Wrap requirement of w3 and url in

ignore-errors too, eval'd when compile.  Require w3 stuff at load
time for nicer failure if it's not available.

lisp/gnus/nnweb.el

@@ -37,8 +37,16 @@
 (require 'w3)
 (require 'url)
 (require 'nnmail)
-(ignore-errors
-  (require 'w3-forms))
+(eval-when-compile
+  (ignore-errors
+   (require 'w3)
+   (require 'url)
+   (require 'w3-forms)))
+;; Report failure to find w3 at load time if appropriate.
+(eval '(progn
+	 (require 'w3)
+	 (require 'url)
+	 (require 'w3-forms)))
 
 (nnoo-declare nnweb)