Add relay interface support to DocBook/kernel-api.tmpl.  Fix typos etc.  in
relay.c and relayfs.txt.
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Acked-by: NTom Zanussi <zanussi@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>