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: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>