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/include/chan_user.h b/arch/um/include/chan_user.h
index 5a2263e..9b9ced8 100644
--- a/arch/um/include/chan_user.h
+++ b/arch/um/include/chan_user.h
@@ -48,7 +48,7 @@
 #define __channel_help(fn, prefix) \
 __uml_help(fn, prefix "[0-9]*=<channel description>\n" \
 "    Attach a console or serial line to a host channel.  See\n" \
-"    http://user-mode-linux.sourceforge.net/input.html for a complete\n" \
+"    http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \
 "    description of this switch.\n\n" \
 );