Add information about required version of the userspace library/utilities
to Documentation/Changes.  Also add pointer to this and to FUSE
documentation from Kconfig.

Thanks to Anton Altaparmakov for the reminder.
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>