uml: fix URLs in Kconfig and help strings

This patch updates links which broke during the transition to the new UML
website.

Signed-off-by: Karol Swietlicki <magotari@gmail.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 55945db..5261db8 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -145,7 +145,7 @@
 	  by removing or changing anything in /proc which gives away the
 	  identity of a UML.
 
-	  See <http://user-mode-linux.sf.net/hppfs.html> for more information.
+	  See <http://user-mode-linux.sf.net/old/hppfs.html> for more information.
 
 	  You only need this if you are setting up a UML honeypot.  Otherwise,
 	  it is safe to say 'N' here.