[PATCH] swsusup with dm-crypt mini howto

The attached patch contains a mini howto for using dm-crypt together with
swsusp.

Signed-off-by: Andreas Steinmetz <ast@domdv.de>
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>