[PATCH] uml: arch Kconfig menu cleanups

*) mark as "EXPERIMENTAL" various items that either aren't very stable or
   that are actively crashing the setup of users which don't really need them
   (i.e.  HIGHMEM and 3-level pagetables on x86 - nobody needs either,
   everybody reports "I'm using it and getting trouble").

*) move net/Kconfig near to the rest of network configurations, and
   drivers/block/Kconfig near "Block layer" submenu.

*) it's useless and doesn't work well to force NETDEVICES on and to disable
   the prompt like it's done.  Better remove the attempt, and change that to a
   simple "default y if UML".

*) drop the warning about "report problems about HPPFS" - it's redundant
   anyway, as that's the usual procedure, and HPPFS users are especially
   technical (i.e.  they know reporting bugs is _good_).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386
index c71b39a..ef79ed2 100644
--- a/arch/um/Kconfig.i386
+++ b/arch/um/Kconfig.i386
@@ -22,13 +22,17 @@
  	default 0x80000000 if HOST_2G_2G
 
 config 3_LEVEL_PGTABLES
-	bool "Three-level pagetables"
+	bool "Three-level pagetables (EXPERIMENTAL)"
 	default n
+	depends on EXPERIMENTAL
 	help
 	Three-level pagetables will let UML have more than 4G of physical
 	memory.  All the memory that can't be mapped directly will be treated
 	as high memory.
 
+	However, this it experimental on 32-bit architectures, so if unsure say
+	N (on x86-64 it's automatically enabled, instead, as it's safe there).
+
 config STUB_CODE
 	hex
 	default 0xbfffe000