Make send/suspend/[url/]dispatch allow values
Make send/suspend/[url/]dispatch allow values

Fix the send/suspend/[url/]dispatch's contracts (any/c -> any) to
allow values (and match the docs).

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket