[PATCH] kernel Doc/ URL corrections

Correct lots of URLs in Documentation/ Also a few minor whitespace cleanups
and typo/spello fixes.  Sadly there are still a lot of bad URLs remaining.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>