Documentation/kernel-docs.txt: Remove offline or outdated entries

This removes all dead links to online docs which
are dead according to Jon and Mauro in
https://lkml.kernel.org/r/20160916182849.2a7101ea

 () vento ! lan

Additionally some references to very old articles refering to
linux 2.2 and 2.0 are deleted.

[mchehab@s-opensource.com: rebased to apply before rename]

Signed-off-by: Richard Sailer <richard@weltraumpflege.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>